Project panel faster (#35634)

- **Use a struct instead of a thruple for visible worktree entries**
- **Try some telemetry**

Closes #ISSUE

Release Notes:

- N/A

---------

Co-authored-by: Piotr Osiewicz <24362066+osiewicz@users.noreply.github.com>

crates/project/src/git_store/git_traversal.rs

@@ -110,11 +110,7 @@ impl<'a> GitTraversal<'a> {
     }
 
     pub fn advance(&mut self) -> bool {
-        self.advance_by(1)
-    }
-
-    pub fn advance_by(&mut self, count: usize) -> bool {
-        let found = self.traversal.advance_by(count);
+        let found = self.traversal.advance_by(1);
         self.synchronize_statuses(false);
         found
     }