Closes
https://linear.app/zed-industries/issue/Z-1760/creating-a-new-file-with-the-same-name-as-an-existing-file-overwrites

Now every rename/creation editor won't do anything if a duplicate name
is submitted.

Release Notes:

* Fixed a bug when created in project panel items with duplicate names
were overwriting the old files

This took so much longer than I wanted, so glad to finally be rid of
this

Release Notes:
* Improved performance when editing many git-tracked files in a
multi-buffer at the same time

This avoids an issue where in a many-buffer multi-buffer, each modified
buffer could complete its recalc independently, causing a cascade of
repeated notifies

Now all recalcs started at the same time must complete before
 A: Starting another recalc pass
 B: The master notify occurring

Each buffer can still show its new diff if something else triggers it
to notify earlier, this is desirable and does not have the same negative
effects as the notify cascade as those re-layouts would need to happen
anyway

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

Supports
https://microsoft.github.io/language-server-protocol/specifications/lsp/3.17/specification/#textDocument_onTypeFormatting

rust-analyzer uses this feature to add matching brackets semantically,
e.g.
before:
![Screenshot 2023-05-23 at 17 46
42](https://github.com/zed-industries/zed/assets/2690773/020e8448-23e6-4a38-8dbb-c9edf18062f7)

after:
![Screenshot 2023-05-23 at 17 46
49](https://github.com/zed-industries/zed/assets/2690773/4d140af3-aca6-451d-ac61-e2a9bb31caea)

`use_on_type_format` settings entry was added, enabled by default, to
disable the new feature.

Release Notes:

* Support `OnTypeFormatting` LSP protocol feature, allowing
rust-analyzer to add matching brackets

Fixes
https://linear.app/zed-industries/issue/Z-1834/bottom-dock-can-be-dragged-down-far-enough-such-that-the-tab-bar-is

Release Notes:

- Improved the resize experience for the bottom dock, preventing it from
becoming too large or too small. (preview-only)

Fixes
https://linear.app/zed-industries/issue/Z-1812/find-in-terminal-panel-is-broken

![CleanShot 2023-05-25 at 15 18
01@2x](https://github.com/zed-industries/zed/assets/482957/ddb33b61-d253-4de1-961f-14b24aaa3e46)

This also removes navigation controls from the terminal panel, given
that terminals don't make use of that feature anyway. When the toolbar
is empty, we'll avoid showing it altogether.

![CleanShot 2023-05-25 at 15 17
26@2x](https://github.com/zed-industries/zed/assets/482957/52419f2c-bca0-494a-a9b3-88e183b4c12f)


Release Notes:

- Fixed a regression that was preventing the terminal panel from being
searched.

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

Fixes
https://linear.app/zed-industries/issue/Z-1818/toggling-the-outline-pane-causes-the-pane-to-zoom

Add release note lines here:

- Fixed a bug that could cause panes to be erroneously zoomed when
toggling modals. (preview-only)

For some reason the yellow I used for the modified color in light themes
was really light
.
Release Notes:

* Improved the contrast of diff modified color in the editor in light
themes.

This adds basic ability to interact with OpenAI inside a buffer.

Release Notes:

* If`OPENAI_API_KEY` is defined in your environment, you can now run the
`ai: assist` command to pass the text of your current buffer to GPT-4.
If you're editing a file with a `.zmd` extension, you can also invoke
the model with `cmd-enter.` (preview-only)

This makes the `Toggle{Left,Right,Bottom}Dock` actions deserializable
from empty JSON, so that they can be constructed for the command
palette. It also fixes a bug in GPUI's `available_actions` method, in
which we'd include key bindings for actions of the same type but
different values.

Note that, for now, the command palette will perform the *focusing*
version of the actions. I'm not totally sure this is the right behavior,
but it seems more useful to me.

Release Notes:

N/A

In this pull request we improved key bindings (as described below) and
added tooltips.

Add these release notes to the panels release notes:

- The left, right and bottom dock can be toggled and focused at the same
time respectively via `cmd-b`, `cmd-r` and `cmd-j`. Holding `shift` will
toggle them without changing the focus.

Co-Authored-By: Nathan Sobo <nathan@zed.dev>

Co-Authored-By: Nathan Sobo <nathan@zed.dev>

Also, bind the same keys with shift to toggle the dock without focusing.

Co-Authored-By: Nathan Sobo <nathan@zed.dev>

Fixes
https://linear.app/zed-industries/issue/Z-987/option-enter-doesnt-open-buffer-from-multibuffer-if-on-the-last-line

This was caused by seeking with a right bias, which in the case of the
last excerpt in the buffer would seek past the end of the buffer. This
commit changes the behavior to move the cursor back to the previous
excerpt if we overshoot, to ensure we always land on an excerpt.

Release Notes:

- Fixed a bug that prevented opening excerpts when the cursor was at the
end of a multi-buffer.

This was caused by seeking with a right bias, which in the case of the
last excerpt in the buffer would seek past the end of the buffer.  This
commit changes the behavior to move the cursor back to the previous excerpt
if we overshoot, to ensure we always land on an excerpt.