https://github.com/user-attachments/assets/200b88b8-249a-4841-97cd-fda8365efd00
Now all users in the collab/ssh session can edit the commit input
collaboratively, observing each others' changes live.
A real `.git/COMMIT_EDITMSG` file is opened, which automatically enables
its syntax highlight, but its original context is never used or saved on
disk — this way we avoid stale commit messages from previous commits
that git places there.
A caveat: previous version put some effort into preserving unfinished
commit messages on repo swtiches, but this version would not do that
— instead, it will be blank on startup, and use whatever
`.git/COMMIT_EDITMSG` contents on repo switch
Release Notes:
- N/A
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Co-authored-by: Cole Miller <cole@zed.dev>
a864168c27