Fixes
https://linear.app/zed-industries/issue/Z-2542/deleting-assistant-conversations-with-zed-open-can-cause-a-crash

We were updating the view's state but missed a `notify`, which caused
the `UniformList` responsible for rendering the saved conversations to
panic when some files were deleted.

Release Notes:

- Fixed a crash that could happen when deleting a saved assistant
conversation from the filesystem.

We were updating the view's state but missed a `notify`, which caused
the `UniformList` responsible for rendering the saved conversations
to panic when some files were deleted.

This PR adds project and branch switchers in top left corner. 

Release Notes:
- Added a project & branch switcher under project name.

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

Updates all collab sounds, add screen sharing sounds.

Release Notes:

- Improved collaboration sounds for joining and leaving a call, muting
and unmuting the mic.
- Added a sound when you start and stop screen sharing.

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

Get rid of superfluous params in RenderParams related to hover & click state.

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

Current logic does not need to access inlays by id in O(1), future
dynamic hints would need to know which hint they hover at, but that will
be done using binary search over the position's anchor we hover on;
nothing else seems to need this HashMap in the near future.

Because of that removal, no need to store `InlayId` apart from the
`Inlay`, hence remove the `InlayProperties` struct entirely.
This allows to eliminate a few generics along the way.

Release Notes:

- N/A

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

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

Fixes
https://linear.app/zed-industries/issue/Z-2430/assistant-quote-selection-does-not-work-in-multi-buffer

Release Notes:

- Added support for invoking `assistant: quote selection` (`cmd->`) when
editing a multi-buffer.

Fixes
https://linear.app/zed-industries/issue/Z-2500/focus-is-moved-from-the-assistant-panel-when-opening-and-closing

Release Notes:

- Fixed a bug that caused modals (such as the command palette) to not
restore focus when dismissing them.

Deals with https://github.com/zed-industries/community/issues/772
Closes
https://linear.app/zed-industries/issue/Z-1518/allow-keybindings-to-be-removed

Now, configuration like 
```json5
[
    {
        "context": "Editor",
        "bindings": {
            "alt-v": null,
        }
    }
]
```

will make `alt+v` to print `√` instead of moving the caret one page up.

Release Notes:

- Added a way to disable keybindings with `null` value

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

Just some theme tidying, renames some things to be more consistent with
our planned naming conventions going forward.

Release Notes:

- N/A (No public facing changes)

Now works with Visual{line} mode, collapses selections like nvim,
and doesn't fall off the end of the line.

We removed the `theme_testbench` crate a while back - It seems like that
was the only thing using the `color_scheme` field in the exported theme.

Removing this from the theme removes something like 42k lines of
generated JSON every time we build the theme (2k lines / 28% of the
total lines per generated theme!)

Release Notes:

- N/A (No public facing changes)

I totally didn't mean to commit this right to main T_T

This reverts commit 5a1476a1e58c43e64d051e5af9786d8edaa85088.

This PR adds a theme store to allow components to directly access the
theme without requiring it to be passed down as props every time it is
used.

So before, you might need to do something like `text(theme, "variant",
"hovered")`, you could now just call `text("variant", "hovered")`.

This also means that style_trees don't need to be called with a theme
either:

```ts
export default function app(): any {
    const theme = useTheme()

    return {
        meta: {
            name: theme.name,
            is_light: theme.is_light,
        },
        command_palette: command_palette(),
        contact_notification: contact_notification(),
        // etc...
    }
}
```

We do this by creating a zustand store to store the theme, and allow it
to be accessed with `useThemeStore.getState().theme`.

```ts
import { create } from "zustand"
import { ColorScheme } from "./color_scheme"

type ThemeState = {
    theme: ColorScheme | undefined
    setTheme: (theme: ColorScheme) => void
}

export const useThemeStore = create<ThemeState>((set) => ({
    theme: undefined,
    setTheme: (theme) => set(() => ({ theme })),
}))

export const useTheme = (): ColorScheme => {
    const { theme } = useThemeStore.getState()

    if (!theme) throw new Error("Tried to use theme before it was loaded")

    return theme
}
```

Release Notes:

- N/A (No public facing changes)

When you hit <escape> in the command palette, it first editor::Cancel
because the command palette is also a focused editor; this binding was
catching before the `menu::Cancel` that you probably want.

From looking at the uses of editor::Cancel it seems like the only way to
trigger this is with <escape> in an editor. Rather than trying to hook
into the existing editor cancel and add vim-specific behaviour, we'll
instead take responsibility for binding directly to <escape> when
necessary.

Fixes: zed-industries/community#1347

This PR adds joined, leaving, mute, and unmute sound effects to Zed. 

Release Notes:

- Added joined, leaving, mute, and unmute sound effects (preview-only)