Add git blame (#8889)

This adds a new action to the editor: `editor: toggle git blame`. When
used it turns on a sidebar containing `git blame` information for the
currently open buffer.

The git blame information is updated when the buffer changes. It handles
additions, deletions, modifications, changes to the underlying git data
(new commits, changed commits, ...), file saves. It also handles folding
and wrapping lines correctly.

When the user hovers over a commit, a tooltip displays information for
the commit that introduced the line. If the repository has a remote with
the name `origin` configured, then clicking on a blame entry opens the
permalink to the commit on the code host.

Users can right-click on a blame entry to get a context menu which
allows them to copy the SHA of the commit.

The feature also works on shared projects, e.g. when collaborating a
peer can request `git blame` data.

As of this PR, Zed now comes bundled with a `git` binary so that users
don't have to have `git` installed locally to use this feature.

### Screenshots

![screenshot-2024-03-28-13 57
43@2x](https://github.com/zed-industries/zed/assets/1185253/ee8ec55d-3b5e-4d63-a85a-852da914f5ba)

![screenshot-2024-03-28-14 01
23@2x](https://github.com/zed-industries/zed/assets/1185253/2ba8efd7-e887-4076-a87a-587a732b9e9a)
![screenshot-2024-03-28-14 01
32@2x](https://github.com/zed-industries/zed/assets/1185253/496f4a06-b189-4881-b427-2289ae6e6075)

### TODOs

- [x] Bundling `git` binary

### Release Notes

Release Notes:

- Added `editor: toggle git blame` command that toggles a sidebar with
git blame information for the current buffer.

---------

Co-authored-by: Antonio <antonio@zed.dev>
Co-authored-by: Piotr <piotr@zed.dev>
Co-authored-by: Bennet <bennetbo@gmx.de>
Co-authored-by: Mikayla <mikayla@zed.dev>

crates/worktree/src/worktree.rs

@@ -277,8 +277,8 @@ pub struct LocalRepositoryEntry {
 }
 
 impl LocalRepositoryEntry {
-    pub fn load_index_text(&self, relative_file_path: &Path) -> Option<String> {
-        self.repo_ptr.lock().load_index_text(relative_file_path)
+    pub fn repo(&self) -> &Arc<Mutex<dyn GitRepository>> {
+        &self.repo_ptr
     }
 }
 

crates/worktree/src/worktree_tests.rs

@@ -459,7 +459,7 @@ async fn test_renaming_case_only(cx: &mut TestAppContext) {
     const OLD_NAME: &str = "aaa.rs";
     const NEW_NAME: &str = "AAA.rs";
 
-    let fs = Arc::new(RealFs);
+    let fs = Arc::new(RealFs::default());
     let temp_root = temp_tree(json!({
         OLD_NAME: "",
     }));
@@ -969,7 +969,7 @@ async fn test_write_file(cx: &mut TestAppContext) {
         build_client(cx),
         dir.path(),
         true,
-        Arc::new(RealFs),
+        Arc::new(RealFs::default()),
         Default::default(),
         &mut cx.to_async(),
     )
@@ -1049,7 +1049,7 @@ async fn test_file_scan_exclusions(cx: &mut TestAppContext) {
         build_client(cx),
         dir.path(),
         true,
-        Arc::new(RealFs),
+        Arc::new(RealFs::default()),
         Default::default(),
         &mut cx.to_async(),
     )
@@ -1153,7 +1153,7 @@ async fn test_fs_events_in_exclusions(cx: &mut TestAppContext) {
         build_client(cx),
         dir.path(),
         true,
-        Arc::new(RealFs),
+        Arc::new(RealFs::default()),
         Default::default(),
         &mut cx.to_async(),
     )
@@ -1263,7 +1263,7 @@ async fn test_fs_events_in_dot_git_worktree(cx: &mut TestAppContext) {
         build_client(cx),
         dot_git_worktree_dir.clone(),
         true,
-        Arc::new(RealFs),
+        Arc::new(RealFs::default()),
         Default::default(),
         &mut cx.to_async(),
     )
@@ -1404,7 +1404,7 @@ async fn test_create_dir_all_on_create_entry(cx: &mut TestAppContext) {
         )
     });
 
-    let fs_real = Arc::new(RealFs);
+    let fs_real = Arc::new(RealFs::default());
     let temp_root = temp_tree(json!({
         "a": {}
     }));
@@ -2008,7 +2008,7 @@ async fn test_rename_work_directory(cx: &mut TestAppContext) {
         build_client(cx),
         root_path,
         true,
-        Arc::new(RealFs),
+        Arc::new(RealFs::default()),
         Default::default(),
         &mut cx.to_async(),
     )
@@ -2087,7 +2087,7 @@ async fn test_git_repository_for_path(cx: &mut TestAppContext) {
         build_client(cx),
         root.path(),
         true,
-        Arc::new(RealFs),
+        Arc::new(RealFs::default()),
         Default::default(),
         &mut cx.to_async(),
     )
@@ -2228,7 +2228,7 @@ async fn test_git_status(cx: &mut TestAppContext) {
         build_client(cx),
         root.path(),
         true,
-        Arc::new(RealFs),
+        Arc::new(RealFs::default()),
         Default::default(),
         &mut cx.to_async(),
     )