Fixes https://github.com/zed-industries/zed/issues/21972

This fixes two bugs:

**Bug 1**: this bug caused us to only ever load a single environment in
a multi-worktree project, thanks to this line:

```rust
if let Some(task) = self.get_environment_task.as_ref()
```

We'd only ever run a single task per project, which is wrong.

What does code does is to cache the tasks per `worktree_id`, which means
we don't even need to cache the environments again, since we can just
cache the `Shared<Task<...>>`.

**Bug 2**: we assumed that every `worktree_abs_path` is a directory,
which lead to `Failed to run direnv` log messages when opening a project
that had a worktree with a single file open (easy to reproduce: open a
normal project, open your settings, close Zed, reopen it — the settings
faile caused environments to not load)

It's fixed by checking whether the `worktree_abs_path` is an absolute
directory. Since this is always running locally, it's fine to use
`smol::fs` here instead of using our `Fs`.

Release Notes:

- Fixed shell environments not being loaded properly to be used by
language servers and terminals in case a project had multiple worktrees.
- Fixed `Failed to run direnv` messages showing up in case Zed restored
a window that contained a worktree with a single file.
https://github.com/zed-industries/zed/issues/21972

We were committing the cardinal sin of subtracting one from a column
without clipping

Closes #ISSUE

Release Notes:

- Fixed a panic in linked editing ranges

Cherry-picked Fix terminal pane tabs arrangement and closing (#22013)

* Fixes the inability to drag and drop terminal tabs to reorder them;
fixed incorrect terminal tab move on drag and drop into existing pane
(follow-up of https://github.com/zed-industries/zed/pull/21238)
* Fixes save dialogue appearing when on closing terminal tabs with
running tasks (follow-up of
https://github.com/zed-industries/zed/pull/21374)

Release Notes:

- Fixed terminal pane tabs arrangement and closing

Co-authored-by: Kirill Bulatov <kirill@zed.dev>

This reverts commit ab595b0d5575285f2351ff085c4a8862f2ddc1f2.

If the instructions are added as the input placeholder, when in a
smaller window size (like the one from the screenshot), scrolling is
needed to see them all. So, thought of extracting it out of there. Also
thought it looked more refined this way!

<img width="800" alt="Screenshot 2024-12-11 at 11 48 17"
src="https://github.com/user-attachments/assets/46974b94-6365-4a59-bf71-a6c0863aac68"
/>

Release Notes:

- N/A

<img width="800" alt="Screenshot 2024-12-11 at 10 57 00"
src="https://github.com/user-attachments/assets/6055639c-5b38-444d-b76d-bf7584a82efc"
/>

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- N/A

Python kernelspec refresh now only performed on (known) python files. 

Release Notes:

- N/A

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- N/A

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

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- N/A

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

Related to #21481 ; it fixes a bunch of hotspots I saw while looking at
the provided profiles. MultiBuffer still takes up 100% CPU on the
foreground thread for me - this time around it's on selection updates
(when dragging the selected text towards an edge of a screen).

Release Notes:

- N/A

This PR adds keyboard shortcuts to common interactions you might want to
do in the Zeta rating panel.

This PR also adds a way to fake inline completion requests, as well as
the test data used to create this PR, to make it easier to adjust the UI
in the future.

It also changes the status bar from the text "Zeta" to "ζ", because I
thought it looked cool.

Release Notes:

- N/A

Starting to fine-tune it.

| No edits scenario | Rated edits scenario |
|--------|--------|
| <img width="1577" alt="Screenshot 2024-12-11 at 01 57 46"
src="https://github.com/user-attachments/assets/42926e84-7a7f-4692-af44-672b52d3d377">
| <img width="1577" alt="Screenshot 2024-12-11 at 01 58 37"
src="https://github.com/user-attachments/assets/ee8ab0ef-75af-424c-b916-9f1ce8b5264d">

Release Notes:

- N/A

It seems like `musl` is required to build on Arch Linux, but it is not included in the dependencies list.

Co-authored-by: Peter Tripp <peter@zed.dev>

This PR sketches in support for sending file context attached to a
message to the model.

Right now the context is just mocked.

<img width="1159" alt="Screenshot 2024-12-10 at 4 18 41 PM"
src="https://github.com/user-attachments/assets/3ee4e86a-7893-42dc-98f9-982aa202d310">

<img width="1159" alt="Screenshot 2024-12-10 at 4 18 53 PM"
src="https://github.com/user-attachments/assets/8a3c2dd7-a466-4dbf-83ec-1c7d969c1a4b">

Release Notes:

- N/A

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- N/A

Improved extension api documentation for latest_github_release function

Release Notes:

- N/A

---------

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

Release Notes:

- Improved LSP resolution of documentation for completions. It now
queries documentation for visible completions and avoids doing too many
redundant queries.

---

In #21286, documentation resolution was made more efficient by only
resolving the current completion. However, this meant that single line
documentation shown inline in the menu was missing until scrolled
to. This also meant that it would wait for navigation to resolve
completion docs, leading to lag for displaying documentation.

This change resolves this by attempting to fetch all the completions
that will be shown. It also mostly avoids re-resolving completions. It
intentionally re-resolves the current selection on navigation, as some
language servers will respond with more information later on.

Closes #21688

Release Notes:

- Windows: Fix freeze after window minimize and maximize

Release Notes:

- N/A

---

This change adds two new methods to the cursor_style_methods function in
the gpui_macros crate (according to the Tailwind CSS documentation
https://tailwindcss.com/docs/cursor):
1. `cursor_nesw_resize`: Sets the cursor style to nesw-resize when
hovering over an element. This is useful for indicating resizing
diagonally from top-right to bottom-left.
2. `cursor_nwse_resize`: Sets the cursor style to nwse-resize when
hovering over an element. This is used for resizing diagonally from
top-left to bottom-right.

This PR changes the Assistant2 chat keybinding from `Cmd-Enter` to just
`Enter`.

Release Notes:

- N/A

This PR updates the Assistant2 panel to match the latest designs.

<img width="1159" alt="Screenshot 2024-12-10 at 11 49 14 AM"
src="https://github.com/user-attachments/assets/53739709-e7b9-4e35-8a5d-97b6560623ed">

Release Notes:

- N/A

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

Release Notes:

- N/A

---------

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

Release Notes:

- N/A

Release Notes:

- N/A

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

Release Notes:

- N/A

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

This reverts commit 571c7d4f6645528c0bf1d2bcacfd623676c69ee7.

Manually tracking the hovered entities causes issues with hightlighting:


https://github.com/user-attachments/assets/932dc022-a0ad-485c-a9db-ef03d7b86032

cc @danilo-leal @nilskch 

Release Notes:

- Fixed an issue where hovering over project panel would not update the
background correctly

Partially addresses #21484


https://github.com/user-attachments/assets/777da5de-15c3-4af3-a597-1835c0155326

Release Notes:

- Support opening images by dropping them onto a pane

Release Notes:

- N/A

---------

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

Closes #21738

Release Notes:

- Added `left_neighbour` option to the `tabs.activate_on_close` setting
to activate the left adjacent tab on tab close.

Closes https://github.com/zed-industries/zed/issues/21792

Release Notes:

- (Preview only) Fixed a panic when drop-splitting the terminal panel

Closes #ISSUE

Release Notes:

- N/A

Note that the git coloring of the icons got removed in
https://github.com/zed-industries/zed/pull/21383

Closes #21772

Release Notes:

- N/A

Makes `Bounds`, `Point`, and `Axis` be serializable, for dumping to JSON without conversion.

Release Notes:

- N/A

Attempt to further clarify what state is present in which mode

Release Notes:

- N/A

This should be a no-op, but clarifies that some fields of the LspStore
were never actually used in the remote case.

Release Notes:

- N/A

These were silently passing after the delay in updating diagnostics was
added.

Co-Authored-By: Max <max@zed.dev>

cc @someonetoignore

Release Notes:

- N/A

---------

Co-authored-by: Max <max@zed.dev>

This PR makes the `metrics_id` field on the `LlmTokenClaims` required,
as we always have one in practice.

Release Notes:

- N/A

This PR attaches two new properties to the `Language Model Used` event:

- `has_llm_subscription` - This will tell us if a user is a paid
subscriber.
- `max_monthly_spend_in_cents` - This will indicate what their maximum
monthly spend is set to.

Release Notes:

- N/A

This PR fixes an issue where the
`max_monthly_llm_usage_spending_in_cents` preference could be set to a
negative value.

Release Notes:

- N/A

This is a no-functionality refactor of where the `ContextMenu` type is
defined. Just the type definition and implementation is up to almost
1,000 lines; so I've moved it to it's own file and renamed the type to
`CodeContextMenu`

Release Notes:

- N/A

This reverts commit 9999c31859210654dd572d54dfa42b67c00b33b0.

Release Notes:

- Fixes diagnostics not updating in some circumstances

This PR fixes an issue where dev extensions were not working when
uploaded to the remote server.

The `extension.toml` for dev extensions may not contain all of the
information (such as the list of languages), as this is something that
we derive from the filesystem at packaging time. This meant that
uploading a dev extension that contained languages could have them
absent from the uploaded `extension.toml`.

For dev extensions we now upload a serialized version of the in-memory
extension manifest, which should have all of the information present.

Release Notes:

- SSH Remoting: Fixed an issue where some dev extensions would not work
after being uploaded to the remote server.

---------

Co-authored-by: Conrad <conrad@zed.dev>

For debugging #21020. Copy-modified [from async_task
here](https://github.com/smol-rs/async-task/blob/ca9dbe1db9c422fd765847fa91306e30a6bb58a9/src/runnable.rs#L432)

Release Notes:

- N/A

Fixed project diff multi buffer not expanding its diff until edited

Release Notes:

- N/A