Git activity indicator (#28204)

Closes #26182

Release Notes:

- Added an activity indicator for long-running git commands.

---------

Co-authored-by: Mikayla Maki <mikayla.c.maki@gmail.com>

crates/project/src/project.rs

@@ -4135,20 +4135,22 @@ impl Project {
         &self,
         buffer: &Entity<Buffer>,
         version: Option<clock::Global>,
-        cx: &App,
+        cx: &mut App,
     ) -> Task<Result<Option<Blame>>> {
-        self.git_store.read(cx).blame_buffer(buffer, version, cx)
+        self.git_store.update(cx, |git_store, cx| {
+            git_store.blame_buffer(buffer, version, cx)
+        })
     }
 
     pub fn get_permalink_to_line(
         &self,
         buffer: &Entity<Buffer>,
         selection: Range<u32>,
-        cx: &App,
+        cx: &mut App,
     ) -> Task<Result<url::Url>> {
-        self.git_store
-            .read(cx)
-            .get_permalink_to_line(buffer, selection, cx)
+        self.git_store.update(cx, |git_store, cx| {
+            git_store.get_permalink_to_line(buffer, selection, cx)
+        })
     }
 
     // RPC message handlers