Use the keychain for authenticating as fallback when api_key is not
present in environment variables.

Release Notes:

- Add consistency between OPENAI_API_KEY management in Semantic Search
and Assistant

Release Notes:

- Improved performance of branch picker by querying branches on menu
open instead of querying once per each keystroke. (fixes
zed-industries/community#2161)

Release Notes:

- Fixed incorrect prettier parsers sometimes being applied to certain
files

@ForLoveOfCats and I found a few speedups that make this acceptably fast
(able to update ~10k selections in <100ms), so the remaining work here
is to fix the tests, and then ship!

Release notes:
- Updated up/down to work based on pixel positions
([#1966](https://github.com/zed-industries/community/issues/1966))
([#759](https://github.com/zed-industries/community/issues/759))
- vim: Fixed off-by-one in visual block mode
([2123](https://github.com/zed-industries/community/issues/2123))

time

Release Notes:

- Removed the screen-sharing indicator from calls. Newer versions of
macOS have a better indicator, and ours panics when you click on it.

Co-Authored-By: Marshall <elliott.codes@gmail.com>

Release Notes:

- vim: Add "Toggle Vim Mode" command

This is now redundant given macOS has the same icon, and it panics when
you click on it :D.

Co-Authored-By: Marshall <elliott.codes@gmail.com>

Whoops, this is what I get for working past-midnight lol, I never pushed
the last commit for https://github.com/zed-industries/zed/pull/3141 so
this PR remedies that

Release Notes:
- NA

Release Notes:
- Added Tailwind autocomplete to Svelte files
([#2029](https://github.com/zed-industries/community/issues/2029)).
- Added Tailwind autocomplete to Phoenix HEEX files
([#2057](https://github.com/zed-industries/community/issues/2057)).
- Added Tailwind autocomplete to Phoenix ~H sigil in Elixir files
([#2057](https://github.com/zed-industries/community/issues/2057)).
- Added Tailwind autocomplete to ERB files
([#2153](https://github.com/zed-industries/community/issues/2153)).
- Added Tailwind autocomplete to PHP files
([#2159](https://github.com/zed-industries/community/issues/2159)).
- Added Tailwind autocomplete to Laravel Blade files
([#2159](https://github.com/zed-industries/community/issues/2159)).

"Temperature" is a parameter in OpenAI GPT models, to control for
randomess in the generated content. To decrease the probability of
either escaping the markdown blocks and creating invalid code, we
decreased temperature for all Non-Prose files. For Markdown or Plain
Text, in which more creativity may be a good thing, we increase the
temperature to allow for more randomness. Along with this, we ask the
generate inline prompt to include only the code and not markdown blocks,
as it appears that lower temperature may decrease the probability of
introducing random markdown blocks.

Release Notes (Internal Only):
- Decrease temperature for inline assist on code content.

Fix some bugs where ChannelNotes and ChannelChat had old cached channel
instances

(This PR was written 100% by the Inline Assistant)

This PR brings in new components into our ai and assistant crates namely
PromptTemplate and PromptChains. They offer a new way to generate
prompts that allow for a more flexible and dynamic approach than before.

Release Notes:
- Introduced PromptTemplate: an abstract base for individual parts of
the prompt.
- Added PromptChains: manage multiple PromptTemplates, sort them based
on priority and regulate the output size based on tokens.
- Provided new PromptArguments structure to encapsulate arguments needed
for PromptTemplate.
    - Extended repository_context to include PromptCodeSnippet.

Co-authored-by: Piotr <piotr@zed.dev>

Tidy up added code to reduce duplicity of X and X_internals.