Add Editor Controls Menu to Tool Bar (#10655)

This PR adds an editor controls menu to the tool bar. This menu will be
used to contain controls that toggle visual features in the editor, like
toggling inlay hints, showing git status or blame, hiding the gutter,
hiding or showing elements in the tool bar, etc.

For the moment, this consolidates the new Inline Git Blame toggle and
the old Inlay Hints toggle. In the future it will contain additional
controls.

Before: 

![CleanShot - 2024-04-16 at 16 38
53@2x](https://github.com/zed-industries/zed/assets/1714999/249e353f-786a-4391-8d49-66dd61feff8a)

After:

![CleanShot - 2024-04-16 at 16 38
43@2x](https://github.com/zed-industries/zed/assets/1714999/5b3cf4d5-855a-4475-ac05-8474b6c94b7b)

---

Release Notes:

- Added an editor controls menu to the tool bar. This will contain
visual, editor-specific options like toggling inlay hints, showing git
status or blame, etc.
- Removed the top level inlay hint toggle from the tool bar due to the
above change.
- Added the ability to toggle inline git blame from the new editor
controls menu.

---------

Co-authored-by: Marshall Bowers <1486634+maxdeviant@users.noreply.github.com>

crates/editor/src/editor.rs

@@ -8889,6 +8889,10 @@ impl Editor {
         cx.notify();
     }
 
+    pub fn git_blame_inline_enabled(&self) -> bool {
+        self.git_blame_inline_enabled
+    }
+
     fn start_git_blame(&mut self, user_triggered: bool, cx: &mut ViewContext<Self>) {
         if let Some(project) = self.project.as_ref() {
             let Some(buffer) = self.buffer().read(cx).as_singleton() else {