This introduces semantic indexing in Zed based on chunking text from
files in the developer's workspace and creating vector embeddings using
an embedding model. As part of this, we've created an embeddings
provider trait that allows us to work with OpenAI, a local Ollama model,
or a Zed hosted embedding.

The semantic index is built by breaking down text for known
(programming) languages into manageable chunks that are smaller than the
max token size. Each chunk is then fed to a language model to create a
high dimensional vector which is then normalized to a unit vector to
allow fast comparison with other vectors with a simple dot product.
Alongside the vector, we store the path of the file and the range within
the document where the vector was sourced from.

Zed will soon grok contextual similarity across different text snippets,
allowing for natural language search beyond keyword matching. This is
being put together both for human-based search as well as providing
results to Large Language Models to allow them to refine how they help
developers.

Remaining todo:

* [x] Change `provider` to `model` within the zed hosted embeddings
database (as its currently a combo of the provider and the model in one
name)


Release Notes:

- N/A

---------

Co-authored-by: Nathan Sobo <nathan@zed.dev>
Co-authored-by: Antonio Scandurra <me@as-cii.com>
Co-authored-by: Conrad Irwin <conrad@zed.dev>
Co-authored-by: Marshall Bowers <elliott.codes@gmail.com>
Co-authored-by: Antonio <antonio@zed.dev>

Before:

![image](https://github.com/zed-industries/zed/assets/13511978/f12a144a-5c41-44e9-8422-aa73ea54fb9c)

After:

![image](https://github.com/zed-industries/zed/assets/13511978/45e9b701-77a8-4e63-9481-dab895a347f7)

Release Notes:

- Fixed window title special characters display on X11.

---------

Co-authored-by: Mikayla Maki <mikayla@zed.dev>

This reverts commit caed275fbf58af9c3ac89ef11229d0a6bd13016f.

NOTE: this should not be merged until #9668 is on stable and the
`ZedVersion#can_collaborate` is updated to exclude all clients without
that change.

Release Notes:

- N/A

---------

Co-authored-by: Piotr Osiewicz <24362066+osiewicz@users.noreply.github.com>

This PR bumps the TOML extension to v0.1.0.

This version of the extension has been updated to use v0.0.6 of the
`zed_extension_api`.

Release Notes:

- N/A

Release Notes:

- Added/Fixed #10350

This PR bumps the Zig extension to v0.1.0.

This version of the extension has been updated to use v0.0.6 of the
`zed_extension_api`.

It also adds support for treating `.zig.zon` files as Zig files
(#10012).

Release Notes:

- N/A

This PR bumps the PHP extension to v0.0.2.

This version of the PHP extension adds the `language_ids` mappings from
#10053.

Release Notes:

- N/A

This PR extracts Terraform support into an extension and removes the
built-in Terraform support from Zed.

Release Notes:

- Removed built-in support for Terraform, in favor of making it
available as
an extension. The Terraform extension will be suggested for download
when you
open a `.tf`, `.tfvars`, or `.hcl` file.

`FindAllReferences` will now open a preview tab, jumping to a definition
will also open a preview tab.


https://github.com/zed-industries/zed/assets/53836821/fa3db1fd-ccb3-4559-b3d2-b1fe57f86481

Note: One thing I would like to improve here is also adding support for
reopening `FindAllReferences` using the navigation history. As of now
the navigation history is lacking support for reopening items other then
project files, which needs to be implemented first.

Release Notes:

- N/A

There was an edge case where the project panel selection would not be
updated when opening a lot of tabs quickly using the preview tab
feature.
I spent way too long debugging this, thankfully @ConradIrwin spotted it
in like 5 minutes 🎉

Release Notes:

- N/A

Release Notes:

- N/A

Although I liked the symmetry of the count in the middle of the arrows,
it's
tricky to make the buttons not occlude the count on hover, so go back to
this arrangement.

Release Notes:

- N/A

Hovering over the `(edited)` text inside a message displays a tooltip
with the timestamp of when the message was last edited:


![image](https://github.com/zed-industries/zed/assets/53836821/be6d68c2-7447-42bc-bd5e-7a9053b3c980)

---

Also removed the `fade_out` style for the `(edited)` text, as this was
causing tooltips to fade out as well:


![image](https://github.com/zed-industries/zed/assets/53836821/91d3cf6a-db58-4e1d-b257-663b2ce1aca4)

Instead it uses `theme().text_muted` now.


Release Notes:

- Hovering over an edited message now displays a tooltip revealing the
timestamp of the last edit.

Fixes a typo in the README which I believe was accidentally committed
yesterday in #10459


Release Notes:

- N/A

Spotted by @SomeoneToIgnore, in #10468 I've used a shortened task label,
which might lead to collisions.

Release Notes:

- N/A

For example:
```
"alt-t": [
    "task::Rerun",
     { "reevaluate_context": true, "allow_concurrent_runs": true }
],
```
Overriding `allow_concurrent_runs` to `true` by itself should terminate
current instance of the task, if there's any.

This PR also fixes task deduplication in terminal panel to use expanded
label and not the id, which depends on task context. It kinda aligns
with how task rerun worked prior to #10341 . That's omitted in the
release notes though, as it's not in Preview yet.

Release Notes:

- `Task::Rerun` action can now override `allow_concurrent_runs` and
`use_new_terminal` properties of the task that is being reran.

This introduces a new API on `StatefulInteractiveElement` to create a
tooltip that can be hovered, scrolled inside, and clicked:
`.hoverable_tooltip`.

Right now we only use it in the `git blame` gutter, but the plan is to
use the new hover/click/scroll behavior in #10398 to introduce new
git-blame-tooltips.

Release Notes:

- N/A

---------

Co-authored-by: Antonio <antonio@zed.dev>

This implements some of #10457.

Release notes:

- Added `g c c` and `g c` to Vim keybindings to toggle comments in
normal and visual mode respectively.
- Added `g ]` and `g [` to Vim keybindings to go to next and previous
diagnostic error.
- Changed `[ x` and `] x` (which select larger/smaller syntax node) in
Vim mode to also work in visual mode.

<img width="1035" alt="Screenshot 2024-04-11 at 13 13 44"
src="https://github.com/zed-industries/zed/assets/13402668/cd0e96a0-41c6-4757-8840-97d15a75c511">

Release Notes:

- Added a notification to show possible `git blame` errors if it fails to run.

Caveats:
- ~git blame now executes in foreground
executor  (required since the Fut is !Send)~

TODOs:
- After a failed toggle, the app thinks the blame
is shown. This means toggling again will do nothing
instead of retrying. (Caused by editor.show_git_blame
being set to true before the git blame is generated)
- ~(Maybe) Trim error?~ Done

---------

Co-authored-by: Thorsten Ball <mrnugget@gmail.com>

This also adds some "responsiveness" so that UI elements are hidden
before everything has to be occluded

Release Notes:

- Improved search UI. It now works in narrower panes, and avoids
scrolling the editor on open.

<img width="899" alt="Screenshot 2024-04-11 at 21 33 17"
src="https://github.com/zed-industries/zed/assets/94272/44b95d4f-08d6-4c40-a175-0e594402ca01">
<img width="508" alt="Screenshot 2024-04-11 at 21 33 45"
src="https://github.com/zed-industries/zed/assets/94272/baf4638d-427b-43e6-ad67-13d43f0f18a2">
<img width="361" alt="Screenshot 2024-04-11 at 21 34 00"
src="https://github.com/zed-industries/zed/assets/94272/ff60b561-2f77-49c0-9df7-e26227fe9225">
<img width="348" alt="Screenshot 2024-04-11 at 21 37 03"
src="https://github.com/zed-industries/zed/assets/94272/a2a700a2-ce99-41bd-bf47-9b14d7082b0e">

Release Notes:

- Added the current operator stack to the Vim status bar at the bottom
of the editor. #4447

This commit introduces a new feature that displays the current partial
command in the vim mode, similar to the behavior in Vim plugin. This
helps users keep track of the commands they're entering.

It's wierd to type code/regex in the UI font

Release Notes:

- Continue to use buffer font for search

This design polish PR brings the project panel context menu into better
alignment with other editors, better follows system patterns and
identifies focus shifting actions with the `…` indicator (like adding a
new folder to a project, which will open a modal window.)

## Before & After:

**Root level**

![CleanShot - 2024-04-11 at 22 40
53@2x](https://github.com/zed-industries/zed/assets/1714999/aa103d14-0747-4be9-acbf-1c3ed0542a15)

**Folder level**

![CleanShot - 2024-04-11 at 22 43
45@2x](https://github.com/zed-industries/zed/assets/1714999/180224f2-26d1-45bd-8f78-822f46068a6d)

**File level**

![CleanShot - 2024-04-11 at 22 44
56@2x](https://github.com/zed-industries/zed/assets/1714999/67edd0ae-bcb6-4920-a480-c4d50c6bccfa)

Note: That double divider in the after has been fixed 😅

---

Release Notes:

- Improved ordering and organization of context menus in the project
panel to bring them closer to those in similar applications.

Fix #8423 

Release Notes:

- vim: Fixed vim-surround motions editing read-only buffer
(preview-only)

Add miss delete key in windows platform.
Release Notes:

- N/A

With the recent Linux rewrite, I attempted to simplify the number of
wrapper structs involved in the Linux code, following the macOS code as
an example. Unfortunately, I missed a vital component: pointers to the
platform state, held by platform data structures. As we hold all of the
platform data structures on Linux, this PR reintroduces a wrapper around
the internal state of both the platform and the window. This allows us
to close and drop windows correctly.

This PR also fixes a performance problem introduced by:
https://github.com/zed-industries/zed/pull/10343, where each configure
request would add a new frame callback quickly saturating the main
thread and slowing everything down.

Release Notes:
- N/A

Release Notes:

- Extracted Ocaml language support into an extension

---------

Co-authored-by: Marshall <marshall@zed.dev>

Release Notes:

- Added private alpha support for remote development. Please reach out to hi@zed.dev if you'd like to be part of shaping this feature.

This PR implements the preview tabs feature from VSCode.
More details and thanks for the head start of the implementation here
#6782.

Here is what I have observed from using the vscode implementation ([x]
-> already implemented):
- [x] Single click on project file opens tab as preview
- [x] Double click on item in project panel opens tab as permanent
- [x] Double click on the tab makes it permanent
- [x] Navigating away from the tab makes the tab permanent and the new
tab is shown as preview (e.g. GoToReference)
- [x] Existing preview tab is reused when opening a new tab
- [x] Dragging tab to the same/another panel makes the tab permanent
- [x] Opening a tab from the file finder makes the tab permanent
- [x] Editing a preview tab will make the tab permanent
- [x] Using the space key in the project panel opens the tab as preview
- [x] Handle navigation history correctly (restore a preview tab as
preview as well)
- [x] Restore preview tabs after restarting
- [x] Support opening files from file finder in preview mode (vscode:
"Enable Preview From Quick Open")
 
I need to do some more testing of the vscode implementation, there might
be other behaviors/workflows which im not aware of that open an item as
preview/make them permanent.

Showcase:


https://github.com/zed-industries/zed/assets/53836821/9be16515-c740-4905-bea1-88871112ef86


TODOs
- [x] Provide `enable_preview_tabs` setting
- [x] Write some tests
- [x] How should we handle this in collaboration mode (have not tested
the behavior so far)
- [x] Keyboard driven usage (probably need workspace commands)
- [x] Register `TogglePreviewTab` only when setting enabled?
- [x] Render preview tabs in tab switcher as italic
- [x] Render preview tabs in image viewer as italic
- [x] Should this be enabled by default (it is the default behavior in
VSCode)?
- [x] Docs

Future improvements (out of scope for now):
- Support preview mode for find all references and possibly other
multibuffers (VSCode: "Enable Preview From Code Navigation")


Release Notes:

- Added preview tabs
([#4922](https://github.com/zed-industries/zed/issues/4922)).

---------

Co-authored-by: Conrad Irwin <conrad.irwin@gmail.com>

Absent some ability to toggle between viewing and editing a file, I
think it would be best to get a fix out quick for people to edit SVGs as
text files.

Release Notes:

- Fixed editing of SVG images by disabling it from the image viewer
([#10403](https://github.com/zed-industries/zed/issues/10403)).

This PR removes some commented-out code that was left over from #10430.

Release Notes:

- N/A

Release Notes:

- Extracted Scheme and Racket language support into extensions.

---------

Co-authored-by: Marshall <marshall@zed.dev>

Fixes regression from https://github.com/zed-industries/zed/pull/10341
where it was not possible to use non-zed environmental variables (e.g.
$PATH) in task definitions.

No release note, as this didn't land on Preview yet.
Release Notes:

- N/A

Release Notes:

- Removed built-in Nix support, now that there is a Nix extension.

Co-authored-by: Marshall <marshall@zed.dev>

Release Notes:

- Extracted lua language support into an extension, and improved Lua
highlighting and completion label styling.

---------

Co-authored-by: Marshall <marshall@zed.dev>

Release Notes:
* Improved Dart syntax highlighting
([#8151](https://github.com/zed-industries/zed/pull/8347#8151))

Before:
<img width="1246" alt="Before"
src="https://github.com/zed-industries/zed/assets/25414681/d9143fe8-c474-40bb-afbd-56fef16edab3">

After:
<img width="1249" alt="After"
src="https://github.com/zed-industries/zed/assets/25414681/4b103c35-fb24-4693-8b9e-3dd494036c9f">


(Shameless plug, since I build the theme)
Theme: The Dark Side

Release Notes:

- Extracted GLSL language support into an extension.

---------

Co-authored-by: Marshall <marshall@zed.dev>
Co-authored-by: Marshall Bowers <elliott.codes@gmail.com>

Release Notes:

- Fixed a bug where extension installation would appear to succeed even
if the download did not complete due to network interruptions
([#10330](https://github.com/zed-industries/zed/issues/10330)).

Co-authored-by: Marshall <marshall@zed.dev>

Release Notes:

- Extracted Elm language support into an extension

Co-authored-by: Marshall <marshall@zed.dev>

As of #10393 some icons in the chat were invisible, looking at the icons
I noticed that the viewport was actually 800x800, I scaled that down to
16x16 and now they work fine again.

Also remove the `reply_arrow_left` icon because it is not used at all.

Thanks to @RemcoSmitsDev for noticing.

I don't have any expertise in svg's, so if something is off about the
svg markup reach out to me.

Release Notes:

- N/A

This PR bumps the Emmet extension to v0.0.2.

This version of the Emmet extension adds Emmet support for PHP and ERB
files.

Release Notes:

- N/A

This PR makes some simple updates to the TextField api and update it's
styling.

Release Notes:

- N/A

I've found it a bit annoying that autogenerated code shows up in
completions when working on Zed, so I've moved them into an associated
function of a struct we're "implementing" Action on. That way, neither a
generated function nor a static show up in completions.

Note that this change only affects Zed codebase! I'm pushing it up right
after last Preview to give it some time on Nightly.
Before:

![image](https://github.com/zed-industries/zed/assets/24362066/7343201f-f05b-4342-a9f7-97f002d88a48)

![image](https://github.com/zed-industries/zed/assets/24362066/e67f9dcb-e090-40e0-873c-e51bd39e0c7e)

After:

![image](https://github.com/zed-industries/zed/assets/24362066/0704211a-73f5-4f12-8583-9e47f092e5b7)

![image](https://github.com/zed-industries/zed/assets/24362066/c6fa00f5-fd8f-4f06-8be7-b74acedccd7c)


Release Notes:

- N/A

When I installed zed by running `brew install zed` following
`README.md`, [brimdata/zed](https://github.com/brimdata/zed) was
installed.
By running `brew install --cask zed`, zed was installed properly.
It seems like `--cask` option is needed.

### Environments:
- OS:
    - macOS 13.4
- Homebrew version: 
    ```sh
    Homebrew 4.2.17-40-gef1c54e
Homebrew/homebrew-core (git revision 0f61f2950ec; last commit
2024-04-03)
Homebrew/homebrew-cask (git revision 40c0a17ee0; last commit 2024-04-03)
    ```

Release Notes:

- N/A

Fixes #7694
The new setting accepts "last_workspace" (default) and "none" as
options.

In a follow-up PR I'll add a new option that re-launches all of the Zed
windows and not just the last one.

Release Notes:

- Added `restore_on_startup` option, accepting `last_workspace`
(default) and `none` options. With `none`, new Zed instances will not
restore workspaces that were open last.

Release Notes:

- Added support for toggling a checkbox in markdown preview by clicking
on it (cmd+click)
([#5226](https://github.com/zed-industries/zed/issues/5226)).

---------

Co-authored-by: Remco Smits <62463826+RemcoSmitsDev@users.noreply.github.com>

Release Notes:

- Added support for scrolling to the message you are replying to when
clicking on the reply preview
([#10028](https://github.com/zed-industries/zed/issues/10028)).

Co-authored-by: Bennet Bo Fenner <53836821+bennetbo@users.noreply.github.com>