Add overflow menu to the git panel (#25618)

Before: 

![CleanShot 2025-02-25 at 20 11
48@2x](https://github.com/user-attachments/assets/2400270e-64fe-4711-a2aa-31588e73367a)

After:

![CleanShot 2025-02-25 at 20 13
18@2x](https://github.com/user-attachments/assets/70c88d2f-5e16-4f2d-9cc5-666b2f9b8de0)

Release Notes:

- N/A
30568e6dd1Nate Butler committed on 2/26/2025, 2:07:10 AM· committed by GitHubparenta5698a4
1 file changedLine totals unavailable