Starting work on the following tests.

* The first failure was caused by not properly dropping the references,
which is now fixed.
* The next failure is caused by a `cx.after_window_update` being changed
to `cx.on_next_frame`. This doesn't seem to work (at least in tests),
but might also explain the flaky following behavior Max and I observed
if there's a timing bug in production too.
* * When you are following someone and they move their cursor you should
receive two proto messages: UpdateBuffer to move the cursor, and
UpdateFollowers to update where you're following. It seems like this
could be made a bit less chatty/fragile, but probably out of scope for
this.
* With that worked around, there's one more failure, but I haven't
looked into it yet. (possibly caused by an incorrect fix for the cx
one).

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

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

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

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

* Fix an incorrect use of `Any::type_id` that prevented the disabling of
key bindings
* Restructured the representation of disabled key bindings so that they
handle context predicates correctly. Previously, to disable key binding,
you needed to supply the exact same context predicate (e.g. `Editor &&
mode == "full"`) as the binding that you are trying to disable. Now, the
context predicates of disabled key bindings are evaluated just like any
other context predicate (with the current context) to see if they apply.

Release Notes:

- Fixed an issue where disabling key bindings didn't work. To disable a
key binding, set it to `null` in your keymap.

* Fix an incorrect use of `Any::type_id` that prevented the disabling of
key bindings
* Restructured the representation of disabled key bindings so that they
handle context predicates correctly. Previously, to disable key binding,
you needed to supply the exact same context predicate (e.g. `Editor &&
mode == "full"`) as the binding that you are trying to disable. Now, the
context predicates of disabled key bindings are evaluated just like any
other context predicate (with the current context) to see if they apply.

Release Notes:

- Fixed an issue where disabling key bindings didn't work. To disable a
key binding, set it to `null` in your keymap.

This PR refines the design of the channel management modal:

#### Before

<img width="585" alt="Screenshot 2024-01-05 at 4 17 32 PM"
src="https://github.com/zed-industries/zed/assets/1486634/a6d96674-b688-4549-8fb8-0a7b2c7c88be">

#### After

<img width="589" alt="Screenshot 2024-01-05 at 4 15 20 PM"
src="https://github.com/zed-industries/zed/assets/1486634/31ae8dc1-a129-4a15-963e-9779b9b79bd9">

Release Notes:

- Improved the look of the channel management modal.

This PR tidies up the styling of the connection status indicators in the
title bar.

Removed some debug styles and tweaked the styling to match the rest of
the title bar overall.

Release Notes:

- Improved the connection status indicators in the title bar.

Bugs from the 0.34.0 collab nightly deploy

This PR fixes a panic that would occur when trying to submit feedback
while within a shared project.

There may be a way we want to support this in the future, but for now we
just show a toast letting the user know this is not supported:

<img width="415" alt="Screenshot 2024-01-05 at 2 46 02 PM"
src="https://github.com/zed-industries/zed/assets/1486634/d3eff4d9-90ba-4257-9857-19b1bc933cf3">

Release Notes:

- Fixed a panic when attempting to open the feedback modal while in a
shared project.

This PR removes the old typescript-based theme system, and it's related
functions.

TODO:
- [x] Create standalone repo of old theme system in case it is needed.
  - https://github.com/zed-industries/zed1-styletrees
- [x] Remove `styles`
- [x] Remove licenses generating code related to `styles`
- [x] Remove docs related to old theme system
- [x] Add license generation to new theme system (#3917)
- [x] Check as best possible that all the places we were accessing
`styles` are removed or updated.

Note: For now, the JSON files in `assets/themes` will remain until we
are finished with the Zed 1 theme importer. We should be able to remove
those in the next few weeks.

Release Notes:

- N/A

This PR updates the diagnostic popovers to use the regular editor text
color rather than one specific to the diagnostic kind.

Release Notes:

- Updated text color in diagnostic popovers.

This PR decouples the generation of licenses for the themes we ship from
the TypeScript theme definitions.

For now, we are embedding the license information for the themes in the
`theme_importer`, and emit a combined `LICENSES` file in the `theme`
crate whenever we import themes. This is also where we check that each
theme has a valid license.

We then use this `LICENSES` file when building up the global license
file for Zed.

This decoupling is one step towards us being able to delete the old Zed1
styles.

Release Notes:

- N/A

This removes one of the path dependencies in gpui that's only really
needed by `workspace` (which can work around lack of these
implementations by itself). In theory it should also improve build
scheduling (as gpui doesn't have to wait for main dependency of sqlez -
libsqlite3 - to finish it's 25 seconds-long build in release), though in
practice I didn't notice a substantial improvement.
Moreover `sqlez` was unused by `settings` too, so that's removed
as well.

Release Notes:

- N/A

According to
https://docs.digitalocean.com/products/kubernetes/how-to/configure-load-balancers/#ssl-certificates

you can specify whether to disable automatic DNS record
creation for the certificate upon the load balancer’s creation using the
do-loadbalancer-disable-lets-encrypt-dns-records annotation. If you
specify true, we will not automatically create a DNS A record at the
apex of your domain to support the SSL certificate.

Release Notes:

- Fixed current LSP logs menu item not shown as selected

Release Notes:

- N/A

This PR upgrades our version of `ctor` to v0.2.6.

We were previously using a fork that contained this fix:
https://github.com/mmastrac/rust-ctor/pull/295.

A new version of `ctor` has now been released with that change, so we
can switch back to the mainline version.

I scanned through the diff between versions (since we're upgrading from
effectively v0.1.20) and didn't notice anything that seemed obviously
breaking:
https://github.com/mmastrac/rust-ctor/compare/564b87f1dc13cf061ef9997ee501fa5378f35ba1...ee6b4b1c7bd3c9c1edad3b6f4d906e767767ba3d

Release Notes:

- N/A

My contact over at nushell told me they are finally getting some fixes
in on the tree sitter repo, as they have an enthusiastic user running
around opening PRs - figured it would be good to bump this again, since
it wasn't in a great place before.

https://github.com/nushell/tree-sitter-nu/commits/main/

Release Notes:

- Bumped `nu` tree sitter dependency

Adding guest roles led us down a rabbit hole where we'd have liked to
rely on a
side-effect of activating a window in tests; but the test window didn't
implement that.

Looking into that, I realized our TestWindow wasn't doing a great job of
emulating the MacWindow, so this makes the two more similar.

This PR iterates on the design of the project search bar:

- Mode selections have been updated to use `ToggleButton`s
- Spacing has been added between the various elements.

Release Notes:

- Improved the look of the project search bar.

Release Notes:

- Show search input field wider for narrow panes

This PR updates the project search empty state to use the same
background color as the editor.

Release Notes:

- Updated the background color of the project search's empty state to
match the editor background.

This PR updates the welcome screen to use the same background color as
the editor.

<img width="1136" alt="Screenshot 2024-01-05 at 11 28 19 AM"
src="https://github.com/zed-industries/zed/assets/1486634/30f2bd7b-e25f-4851-9f43-eb187d1d62e6">

Release Notes:

- Updated the background color of the welcome screen to match the editor
background.

This PR introduces Tinted button styles and the `selected_style` field
on buttons to allow replicating the previous design of titlebar call
controls. It also updates the styles of the titlebar controls.

### Creating a tinted button:

```
Button::new("accept-cta", "Accept")
    .style(ButtonStyle::Tinted(TintColor::Accent))
    .on_click(...)
```

Ths button will always be tinted blue.

### Creating a button that becomes tinted when selected::

```rust
IconButton::new("screen-share", Icon::Screen)
    .style(ButtonStyle::Subtle)
    .selected(is_screen_sharing)
    .selected_style(ButtonStyle::Tinted(TintColor::Accent))
    .on_click(...),
```

This button will be flat/subtle by default, but be tinted blue when it
is `selected`.

Note: There appears to be some issue where `is_deafened` isn't
activating correctly, making the speaker icon not toggle when selected.

Release Notes:

- Restore call control styles to a similar look to Zed 1.

This PR makes it so we respect the setting to show/hide the assistant
and chat panels.

Resolves https://github.com/zed-industries/community/issues/2370.

Release Notes:

- Fixed an issue where the settings to show/hide certain panels were not
respected.

Release Notes:

- Fixed a leak that would prevent projects from being automatically
unshared or left when closing the corresponding window.