Preemptive fixes required for #26734

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---------

Co-authored-by: Marshall Bowers <git@maxdeviant.com>

Closes #ISSUE

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This PR does some stylistic cleanup of the feedback comments submission
code.

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I may have a newer version of clippy than CI. Also removes some unused
code in `livekit_client.rs`

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This PR adds passing in `stop_on_entry` to debug configs in debug.json
instead of going through initialization args.

This has two benefits:

1. It's more streamlined to a user since every internal adapter supports
`stop_on_entry` for launch requests and Go's adapter supports it for
attach requests too.
2. It will allow @osiewicz `NewSesssionModal` PR to use this field for
the stop on entry checkbox.

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This fixes a bug in #27568 that caused flickering in the git panel's
checkbox state when staging and unstaging entire files. The problem is
that that stage/unstage action first saves the target path (if it's open
as a buffer), and we do a targeted git status scan in response to that
filesystem event, which makes its way to the git panel and causes it to
clear its pending state before the actual stage or unstage has gone
through.

The fix is to not clear the panel's pending state for git repository
events that originated from a targeted scan (i.e. one that was triggered
by FS events for repo paths, as opposed to events inside `.git` which
cause all statuses to be recomputed).

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This PR makes the command permission prompt part of the tool card and
allow users to straight away change the `always_allow_tool_actions`
setting via the "Always Allow" button from that card. If that button is
clicked, that setting is turned on, and any command that requires
permission from that point on will auto-run.

Additionally, if a bash command spans multiple lines, we show the line
count at the end of the command string. (Note: this is not perfect yet
because it can likely be not visible by default, but we didn't think
this was a major blocker for now. We'll work on improving this next).

### Thread View

<img
src="https://github.com/user-attachments/assets/00f93c39-990f-4b79-84ec-0427b997167f"
width="500"/>

### Settings View

<img
src="https://github.com/user-attachments/assets/52d32435-7c8d-4ab4-a319-6cabc007267b"
width="500"/>


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---------

Co-authored-by: Thomas Mickley-Doyle <tmickleydoyle@gmail.com>
Co-authored-by: Bennet Bo Fenner <bennetbo@gmx.de>
Co-authored-by: Nathan Sobo <nathan@zed.dev>
Co-authored-by: Antonio Scandurra <me@as-cii.com>

Closes #ISSUE

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This PR adds an `AgentProfileId` newtype for profile IDs that we can use
instead of `Arc<str>` everywhere.

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Closes https://github.com/zed-industries/zed/issues/27936

Adds additional comparison after the existing history-based comparison.

This comparison checks whether the first position matched via fuzzy
search is in the file name. If so, we prioritize this match over one in
the path. If both items match either the file name or the path, the
existing comparison logic is used.

- [x] Tests

Before:
<img width="580" alt="image"
src="https://github.com/user-attachments/assets/011fdd01-3dfa-4950-abb1-dfda10885664"
/>

After:
<img width="614" alt="image"
src="https://github.com/user-attachments/assets/9c4944b0-83dc-4611-94bb-aae1758fab23"
/>


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- Fixed an issue where fuzzy matching in file finder did not properly
prioritize matches in file names.

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This PR removes the `use_any_tool` method from the `LanguageModel`
trait.

It was not being used anywhere, and doesn't really fit in our new tool
use story.

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This PR makes it so we return an error to the model if it tries to use a
tool that is not currently enabled:

<img width="628" alt="Screenshot 2025-04-02 at 11 10 55 AM"
src="https://github.com/user-attachments/assets/e4bdf01c-f0ea-4c9c-805a-11868bd9c771"
/>

This allows the model to adapt based on that:

<img width="637" alt="Screenshot 2025-04-02 at 11 08 38 AM"
src="https://github.com/user-attachments/assets/41016b47-933c-4dcb-b791-847be0548c8a"
/>

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We were including the context at the end which meant it never got
cached. We'll now include it with the first message that introduced it
so it's cached as long as it doesn't change.

This is an improvement, but we probably still need to think of ways to
optimize caching for cases where files in context change.

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It's super easy to undo those changes. In a future PR, we should also
avoid requiring confirmation in the batch tool if all the underlying
tools don't require confirmation.

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Closes #ISSUE

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- Fixed git repositories being added for files outside the project

This PR removes an unneeded `else if` branch that was the same as the
previous branch in the conditional.

Doesn't seem necessary to run this twice.

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I had introduced the same thing a few days ago without noticing there
was one in place already!

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<img
src="https://github.com/user-attachments/assets/76ae380c-6d5b-4ed6-9b47-9a4c44b00042"
width="500" />

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This PR makes it so if we receive a tool use from the model without any
corresponding text, we'll insert some placeholder text to keep the
conversation in a well-structured format.

This aims to fix an error that Antonio was seeing:


![image](https://github.com/user-attachments/assets/eeba95ef-9b67-41d7-bce3-afe84bcdc7b1)

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This PR updates the Copilot Chat language model to indicate it does not
yet support tool use in Zed.

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This PR updates the tool names in the default profiles, as they were not
updated after the tool names were changed to snake_case in #27903.

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This seems to improve the performance of `gemini-2.5-pro-exp-03-25`
significantly.
We know define a single `Tool` that has multiple `FunctionDeclaration`s,
instead of defining multiple `Tool`s with a single
`FunctionDeclaration`.
Oddly enough the `flash` models seemed to work perfectly fine with the
multiple `Tool { ... }` definitions

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The [Gemini
docs](https://ai.google.dev/gemini-api/docs/function-calling?example=weather#function_declarations)
state that function names should be in `snake_case` or `camelCase`.

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- Added `g?` convert to `Rot13`/`Rot47`

---------

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

Closes #ISSUE

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This PR renames the `assistant2` crate to `agent`.

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This PR bumps the revision of the `livekit-rust-sdks` crate.

I was running into issue where Cargo was stuck on "Updating git
submodule `https://chromium.googlesource.com/libyuv/libyuv`".

I resolved the issue by forking `libyuv` to
https://github.com/zed-industries/libyuv and updating our
`livekit-rust-sdks` fork to use it in
https://github.com/zed-industries/livekit-rust-sdks/pull/4.

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Closes #ISSUE

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- Ensure that only one repository is shown in the git UI when two
subdirectories of a repository root are open in Zed

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- Added correct syntax highlighting for use bounds and async closures in
Rust.

- bump our livekit version to include a fix for a crane bug (TODO: add
link when an issue is filed on crane)
- switch to a clang stdenv for both linux and macos
- manually unify versions of our notify crate
- remove old linker flags which were only needed for livekit
- fix an issue where RUSTFLAGS shadowed the rustflags from cargo configs

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This PR updates the `ResetMode` enum to use doc comments for its
variants instead of line comments.

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---------

Co-authored-by: Nathan Sobo <nathan@zed.dev>
Co-authored-by: Max Brunsfeld <maxbrunsfeld@gmail.com>

We'll now prompt the user to start a new thread when the active one gets
too long.

<img width=500
src="https://github.com/user-attachments/assets/91445bc0-3e81-422f-aa4a-b8f0741f9d9a"></img>


When they click "Start New Thread", will create a new one with the
previous one added as context.

<img width=500
src="https://github.com/user-attachments/assets/c3b4223f-5bdd-4ba4-956f-5a5880d5e2c3"></img>

Instead of including the full thread text, we'll now add summarized
versions of threads to the context, allowing you to continue the
conversation even if it was near the token limit.

- Thread summaries are cached and persisted. 
- A cached summary is invalidated if the thread is continued.
- We start generating the thread summary as soon as it's selected from
the picker. Most times, the summary will be ready by the time the user
sends the message.
- If the summary isn't ready by the time a message is sent, the user
message will be displayed in the thread immediately, and a "Summarizing
context..." indicator will appear. After the summaries are ready, we'll
start generating the response and show the usual "Generating..."
indicator.

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---------

Co-authored-by: Danilo Leal <daniloleal09@gmail.com>
Co-authored-by: Marshall Bowers <git@maxdeviant.com>

Closes #20391

### Summary
This adds a persistence layer to the command palette so that usages can
persist after Zed is closed and re-opened.

The current "usage" algorithm is unchanged, e.g.:
- Sorts by number of usages descending (no recency preference)
- Once a user's query is active, removes these suggestions in favor of
fuzzy matching

There are some additional considerations in order to keep the DB from
growing uncontrollably (and to make long-term use ergonomic):
- The "invocations" count handles max values (though at u16, it seems
unlikely a user will deal with this)
- If a command is un-invoked for more than a month, it stops being
considered a recent usage, and its next update will update its usages
back to 1

### Future Considerations
- Could make the "command expiry" configurable in settings, so the user
can decide how long to hold onto recent usages
- Could make a more sophisticated algorithm which balances recency and
total invocations - e.g. if I've used COMMAND_A 100 times in the last
month, but COMMAND_B 10 times today, should COMMAND_B actually be
preferred?
- Could do preferential fuzzy-matching against these matches once the
user starts a query.

Release Notes:

- Added persistent history of command palette usages.

---------

Co-authored-by: Peter Finn <mastion11@gmail.com>
Co-authored-by: Conrad Irwin <conrad.irwin@gmail.com>

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- N/A

---------

Co-authored-by: Kirill Bulatov <mail4score@gmail.com>

This PR completes the process of moving git repository state storage and
scanning logic from the worktree crate to `project::git_store`.

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- N/A

---------

Co-authored-by: Max Brunsfeld <maxbrunsfeld@gmail.com>
Co-authored-by: Conrad <conrad@zed.dev>

This PR renames the `assistant2` actions to `agent`.

Note that any `assistant` actions have been left as-is for now so that
there aren't any changes to users not in the feature flag.

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This makes it easier to iterate on the nix flake by adding a package
which builds zed in debug mode rather than release

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<img width=400
src="https://github.com/user-attachments/assets/4132e075-3f2a-4c65-8c06-c3428f3ad477">

<img width=400
src="https://github.com/user-attachments/assets/95908b32-a9b9-45c3-9db9-dcbeedffc5e7">

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Just adding to the existing https://zed.dev/docs/vim#ex-commands

Captial G is not used by vim commands.

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This PR adds some affordances for when the currently-selected model does
not support tools.

We disable the profile selector and put it into a "No Tools" state:

<img width="1394" alt="Screenshot 2025-04-01 at 3 58 00 PM"
src="https://github.com/user-attachments/assets/de6ecb0f-7657-4e16-9d5d-7bbfbc2b0a5c"
/>

We will also only attach tools to the request to the model if the model
supports it.

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Follow-up to https://github.com/zed-industries/zed/pull/27812

This PR makes sure these errors cases also show up in the panel's empty
state even when there is past data.

| No ToS | Missing Provider |
|--------|--------|
| ![CleanShot 2025-04-01 at 4  49
36@2x](https://github.com/user-attachments/assets/6da6bdc9-daa6-4a7b-a224-989eb845e205)
| ![CleanShot 2025-04-01 at 4  50
04@2x](https://github.com/user-attachments/assets/bddf62cb-3727-44b5-b115-9a88313c6d85)
|

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