git: Git Panel UI, continued (#22960)

TODO:

- [ ] Investigate incorrect hit target for `stage all` button
- [ ] Add top level context menu
- [ ] Add entry context menus
- [x] Show paths in list view
- [ ] For now, `enter` can just open the file
- [ ] 🐞: Hover deadzone in list caused by scrollbar
- [x] 🐞: Incorrect status/nothing shown when multiple worktrees are
added

---

This PR continues work on the feature flagged git panel.

Changes:
- Defines and wires up git panel actions & keybindings
- Re-scopes some actions from `git_ui` -> `git`.
- General git actions (StageAll, CommitChanges, ...) are scoped to
`git`.
- Git panel specific actions (Close, FocusCommitEditor, ...) are scoped
to `git_panel.
- Staging actions & UI are now connected to git!
- Unify more reusable git status into the GitState global over being
tied to the panel directly.
- Uses the new git status codepaths instead of filtering all workspace
entries

Release Notes:

- N/A

---------

Co-authored-by: Cole Miller <53574922+cole-miller@users.noreply.github.com>
Co-authored-by: Cole Miller <cole@zed.dev>

crates/collab/src/tests/random_project_collaboration_tests.rs

@@ -1221,7 +1221,7 @@ impl RandomizedTest for ProjectCollaborationTest {
                                         id,
                                         guest_project.remote_id(),
                                     );
-                                    assert_eq!(guest_snapshot.repositories().collect::<Vec<_>>(), host_snapshot.repositories().collect::<Vec<_>>(),
+                                    assert_eq!(guest_snapshot.repositories().iter().collect::<Vec<_>>(), host_snapshot.repositories().iter().collect::<Vec<_>>(),
                                         "{} has different repositories than the host for worktree {:?} and project {:?}",
                                         client.username,
                                         host_snapshot.abs_path(),