Start on adding support for editing via the assistant panel (#14795)

Note that this shouldn't have any visible user-facing behavior yet. The
feature is incomplete but we wanna merge early to avoid a long-running
branch.

Release Notes:

- N/A

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Co-authored-by: Nathan <nathan@zed.dev>
4d177918c1Antonio Scandurra committed on 7/19/2024, 9:13:15 AM· committed by GitHubparent87457f9
44 files changedLine totals unavailable