editor: Update git hunk indicators to show staging status when hunk is expanded (#24818)

- Update git hunk indicators to show staging status when hunk is
expanded
- Updates uses of status colors to the new version control theme colors
- Adds new version control theme colors to included themes

Before:

![CleanShot 2025-02-13 at 14 42
48@2x](https://github.com/user-attachments/assets/ccca147e-0de2-4e69-9cd4-01b010bf06d0)

After:

![CleanShot 2025-02-13 at 14 42
04@2x](https://github.com/user-attachments/assets/1ab49174-bde5-43b2-83c5-d217533df49a)

(Colors here are from before theme colors were added)


Release Notes:

- N/A *or* Added/Fixed/Improved ...

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Co-authored-by: cole-miller <m@cole-miller.net>