https://github.com/user-attachments/assets/7aa683e3-c52c-49e7-9934-ed4df6a1f8e2

Self-Review Checklist:

- [X] I've reviewed my own diff for quality, security, and reliability
- [x] Unsafe blocks (if any) have justifying comments
- [X] The content is consistent with the [UI/UX
checklist](https://github.com/zed-industries/zed/blob/main/CONTRIBUTING.md#uiux-checklist)
- [X] Tests cover the new/changed behavior
- [X] Performance impact has been considered and is acceptable

Release Notes:

- Added a `Copy Tag` action to the git graph context menu.