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

There were times when events with bad data were being emitted. What we
found was that places where certain collaboration-related code could
fail, like sending an invite, would still send events; those events
would be in a bad state, as certain elements, such as a room, weren't
constructed as expected, causing the event to have missing data. The new
API guarantees that we have data in the correct configuration. In the
future, we will add events for certain types of failures within Zed, to
cover things like invites failing.

Release Notes:

- N/A

There were time when events with bad data were being emitted. What we found was that places where certain collaboration-related code could fail, like sending an, would still send events, and those events be in a bad state, as certain elements weren't constructed as expected, thus missing in the event. The new API guarantees that we have data in the correct configuration. In the future, we will add events for certain types of failures within Zed.

Co-Authored-By: Julia <30666851+ForLoveOfCats@users.noreply.github.com>

Release Notes:
- N/A

This fixes the undo with replace in project
/cc @maxbrunsfeld 

Release Notes:

- N/A

Release Notes:
- N/A

This PR removes a leftover `dbg!` from `styleable_helpers!`.

We already removed this in the `gpui2-ui` branch, but getting this on
`main` since @KCaverly pointed it out.

Release Notes:

- N/A

Adding a few bindings to bring first class feeling multiselect to zed's
vim emulation.

gn and gN are similar to similar vim bindings, ga is similar to gA (and
I doubt we need vim's real ga), g> and g< are just made up.

Release Notes:

- vim: `g n` / `g N` to select next/previous
- vim: `g >` / `g <` to skip current selection and select next/previous
- vim: `g a` to select all

- g n / g N to select next/previous
- g > / g < to select next/previous replacing current
- g a to select all matches

This fixes several bugs with how spaces and keyboard commands interact
with channel creating / renaming.

fixes
https://github.com/zed-industries/community/discussions/2076#discussioncomment-7096959

Release Notes:

- N/A

Release Notes:

- Allow cmd-+ in addition to cmd-= for zoom in
([#1021](https://github.com/zed-industries/community/issues/1021)).

Although I had initially thought this was something more to do with
option key handling, it turns out to be a straightforward and reasonable
feature request.

Release Notes:

- vim: Add v1 of command mode
([#279](https://github.com/zed-industries/community/issues/279)). The
goal was to cover 90% of what most people actually do, but it is very
incomplete. Known omissions are that ranges cannot be specified (except
that `:%s//` must always specify the % range), commands cannot take
arguments (you can `:w` but not `:w [file]`), and there is no history.
Please file feature requests on
https://github.com/zed-industries/community as you notice things that
could be better.
- `:` triggers zed's command palette. If you type a known vim command it
will run it, otherwise you get zed's normal fuzzy search. For this
release supported commands are limited to:
- - `:w[rite][!]`, `:wq[!]`, `:q[uit][!]`, `:wa[ll][!]`, `:wqa[ll][!]`,
`:qa[ll][!]`, `:[e]x[it][!]`, `:up[date]` to save/close tab(s) and
pane(s).
- - `:cq` to quit completely.
- - `:vs[plit]`, `:sp[lit]` to split vertically/horizontally
- - `:new`, `:vne[w]` to create a new file in a new pane above or to the
left
- - `:tabedit`, `:tabnew` to create a new file in a new tab.
- - `:tabn[ext]`, `:tabp[rev]` to go to previous/next tabs
- - `:tabc[lose]` to close tabs
- - `:cn[ext]`, `:cp[rev]`, `:ln[ext]`, `:lp[rev]` to go to the
next/prev diagnostics.
- - `:cc`, `:ll` to open the errors page
- - `:<number>` to jump to a line number.
- - `:$` to jump to end of file
- - `:%s/foo/bar/` (note that /g is always implied, the range must
always be %, and zed uses different regex syntax to vim)
- - `:/foo` and `:?foo` to jump to next/prev line matching foo
- - `:j[oin]`, to join the current line (no range is yet supported)
- - `:d[elete][l][p]`, to delete the current line (no range is yet
supported)
- - `:s[ort] [i]` to sort the current selection (case-insensitively)
- vim: Add `ctrl-w o` (closes everything except the current item) and
`ctrl-w n` (creates a new file in the pane above).
([#1884](https://github.com/zed-industries/community/issues/1884))
- all: Add a "Discard" option to prompt when saving a file with
conflicts (previously this only appeared on close, not on save).

Internal changes:
- The Picker will now wait for pending queries before confirming (to
handle people typing `: w enter` rapidly.
- workspace::save_item and Pane::save_item are now merged together, and
the behavior controlled by `workspace::SaveIntent`.
- Many actions related to closing/saving items now take an optional
`SaveIntent`.
-

This reverts commit 5c75450a77b0579649bbf79365c9cef5a2c1110f.

This is a PR I built for a friend of a friend at StrangeLoop, who is
making a much better LSP for elixir that elixir folks want to experiment
with. This PR also improves the our debug log viewer to handle LSP
restarts.

TODO:
- [ ] Make sure NextLS binary loading works.

Release Notes:

- Added support for the experimental Next LS for Elxir, to enable it add
the following field to your settings to enable:

```json
"elixir": {
    "next": "on"
}
```

Release Notes:

- Fixed clicking a code action only ever performing the first action in
the list rather than the one clicked on.

This reverts commit 0a491e773b689a74f96b7555070cf5a3bf245543.

For github.com/zed-industries/community#1021

Release Notes:
- Fixed the code action popup menu not scrolling as selection moves.

Add buffer path to the prompt.

Z-2903

Release Notes:
- Added a "Save all/Discard all" prompt when closing a pane with
multiple edited buffers.

Improve settings interface to local LSP

This PR restructures the `ui` crate into just `elements` and
`components`.

This was already done on the `gpui2-ui` branch, just getting it onto
`main`.

Release Notes:

- N/A

---------

Co-authored-by: Nate Butler <nate@zed.dev>

This PR mainlines the `Icon` and `IconButton` changes from the
`gpui2-ui` branch.

Release Notes:

- N/A

Co-authored-by: Nate Butler <nate@zed.dev>

This PR updates the storybook CLI to support displaying all of the
available stories.

The `--help` flag will now show a list of all the available stories:

<img width="1435" alt="Screenshot 2023-09-22 at 6 11 00 PM"
src="https://github.com/zed-industries/zed/assets/1486634/284e1a24-46ec-462e-9709-0f9b6e94931f">

Inputting an invalid story name will also show the list of available
stories:

<img width="1435" alt="Screenshot 2023-09-22 at 6 10 43 PM"
src="https://github.com/zed-industries/zed/assets/1486634/1ce3ae3f-ab03-4976-a06a-5a2b5f61eae3">

Release Notes:

- N/A

This PR scaffolds the `Toolbar` and `Breadcrumb` components.

Right now they both just consist of hardcoded data.

<img width="846" alt="Screenshot 2023-09-22 at 4 54 00 PM"
src="https://github.com/zed-industries/zed/assets/1486634/70578df2-7216-42d2-97ef-d38b83fb4a25">

<img width="799" alt="Screenshot 2023-09-22 at 4 46 04 PM"
src="https://github.com/zed-industries/zed/assets/1486634/73ca3d8a-baf9-4ed4-b4c4-279c674672a3">

Release Notes:

- N/A

This PR updates the UI component stories to label the various states
that they are in.

Release Notes:

- N/A

This PR improves the error message when `FontCache.load_family` attempts
to load a font that is not present on the system.

I ran into this while trying to run the `storybook` for the first time.
The error message indicated that a font family was not found, but did
not provide any information as to which font family was being loaded.

### Before

```
   Compiling storybook v0.1.0 (/Users/maxdeviant/projects/zed/crates/storybook)
    Finished dev [unoptimized + debuginfo] target(s) in 8.52s
     Running `/Users/maxdeviant/projects/zed/target/debug/storybook`
thread 'main' panicked at 'called `Result::unwrap()` on an `Err` value: could not find a non-empty font family matching one of the given names', crates/theme/src/theme_settings.rs:132:18
note: run with `RUST_BACKTRACE=1` environment variable to display a backtrace
libc++abi: terminating due to uncaught foreign exception
fish: Job 1, 'cargo run' terminated by signal SIGABRT (Abort)
```

### After

```
   Compiling storybook v0.1.0 (/Users/maxdeviant/projects/zed/crates/storybook)
    Finished dev [unoptimized + debuginfo] target(s) in 7.90s
     Running `/Users/maxdeviant/projects/zed/target/debug/storybook`
thread 'main' panicked at 'called `Result::unwrap()` on an `Err` value: could not find a non-empty font family matching one of the given names: `Zed Mono`', crates/theme/src/theme_settings.rs:132:18
note: run with `RUST_BACKTRACE=1` environment variable to display a backtrace
libc++abi: terminating due to uncaught foreign exception
fish: Job 1, 'cargo run' terminated by signal SIGABRT (Abort)
```

Release Notes:

- N/A

This PR removes the need for writing manual mappings in the `FromStr`
implementation for the `StorySelector` enum used in the storybook CLI.

We are now using the
[`EnumString`](https://docs.rs/strum/0.25.0/strum/derive.EnumString.html)
trait from `strum` to automatically derive snake_cased names for the
enums.

This will cut down on some of the manual work needed to wire up more
stories to the storybook.

Release Notes:

- N/A

This PR puts the `Theme` returned from the `theme` function behind an
`Arc`.

### Motivation

While working on wiring up window focus events for the `TitleBar`
component we ran into issues where `theme` was holding an immutable
borrow to the `ViewContext` for the entirety of the `render` scope,
which prevented having mutable borrows in the same scope.

### Explanation

To avoid this, we can make `theme` return an `Arc<Theme>` to allow for
cheap clones and avoiding the issues with the borrow checker.

Release Notes:

- N/A

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

This PR factors out the bulk of the boilerplate required to setup a
story in the storybook out into separate components.

The pattern we're using here is adapted from the "[associated
component](https://maxdeviant.com/posts/2021/react-associated-components/)"
pattern in React.

Release Notes:

- N/A

Reorganized assistant/semantic_index crates and introduced AI crate to
include shared functionality.

Release Notes:

- Moved most of the Assistant functionality from ai crate to assistant
crate
- Moved interaction with embedding providers from semantic_index to ai
crate

Last follow-up of https://github.com/zed-industries/zed/pull/3002
Fixes
https://zed-industries.slack.com/archives/C04S6T1T7TQ/p1695281196667609

Copilot sends multiple events about its LSP server readiness, not
necessarily recreating the server from scratch (e.g. due to re-sign in
action). Avoid re-adding same log subscriptions on the same LSP server,
which causes panics.

Release Notes:

- N/A