Introduce BrancesButton in title bar

Co-Authored-By: Mikayla Maki <mikayla.c.maki@gmail.com>

crates/project/src/worktree.rs

@@ -137,6 +137,10 @@ impl RepositoryEntry {
     pub fn branch(&self) -> Option<Arc<str>> {
         self.branch.clone()
     }
+
+    pub fn work_directory(&self) -> Arc<Path> {
+        self.work_directory.0.clone()
+    }
 }
 
 /// This path corresponds to the 'content path' (the folder that contains the .git)
@@ -1459,6 +1463,10 @@ impl Snapshot {
             .map(|entry| entry.to_owned())
     }
 
+    pub fn git_entries(&self) -> impl Iterator<Item = &RepositoryEntry> {
+        self.repository_entries.values()
+    }
+
     pub fn scan_id(&self) -> usize {
         self.scan_id
     }