Add stop generating button to cody web (sourcegraph#53191)

Add stop generating button for in progress message for cody in web.
<img width="760" alt="image"
src="proxy.php?url=https%3A%2F%2Fgithub.com%2F%3Ca+href%3D"https://github.com/sourcegraph/sourcegraph/assets/22571395/8ea16443-a125-4a73-8859-eb815cdd89e3">https://github.com/sourcegraph/sourcegraph/assets/22571395/8ea16443-a125-4a73-8859-eb815cdd89e3">


https://www.loom.com/share/811352d2fb6942ff9851c9dedda281e1
## Test plan

- visit /cody
- ask a question
- click on stop generating button
- reload the page

Cody: display error on older SG version or when cody is not enabled(s…

…ourcegraph#52739)

Embeddings: respect minimum interval for non-completed jobs (sourcegr…

…aph#52799)

In sourcegraph#52505 we added a minimum interval between embeddings jobs. It only
checked for completed jobs within the time window, which meant that if a
job was queued, processing, or cancelled, the policy would immediately
attempt to schedule another.

This PR updates the minimum interval check to include all recent jobs,
regardless of state. The semantics are now "we will not schedule new job
if we've already kicked off a job for that repo in the past 24h".

Update embedded-repos.md with latest list of embedded repos (sourcegr…

…aph#52568)

Automation coming in the next PR 😄 

I promise this looks ok @unknwon 
## Test plan
N/A

<!-- All pull requests REQUIRE a test plan:
https://docs.sourcegraph.com/dev/background-information/testing_principles
-->

syntax-highlighter: initial ctags work (w/ musl scip-ctags) (sourcegr…

…aph#52643)

- Write Rust one-for-one protocol compatible replacement for
universal-ctags in JSON streaming mode (scip-ctags)
- Use tree-sitter to generate scip symbols, then emit those through
scip-ctags
- These symbols will be reused for Cody context 
- Ensure code is built with musl libc

## Test plan

Unit and snapshot tests in the Rust symbol generation code - verified
working in the symbols sidebar and symbol search for enabled languages.

---------

Co-authored-by: TJ DeVries <[email protected]>
Co-authored-by: William Bezuidenhout <[email protected]>
Co-authored-by: Eric Fritz <[email protected]>
Co-authored-by: Eric Fritz <[email protected]>
Co-authored-by: Jean-Hadrien Chabran <[email protected]>