This PR adds Git status badges next to file names in the Project Panel,
following my older PR #49802
These are enabled by having "git_status" true.

Screenshot
<img width="343" height="320" alt="image"
src="https://github.com/user-attachments/assets/b2c208bf-5027-4947-a5ee-eeb74fadb02b"
/>

I'd love to hear feedback about any of this :)
Especially feedback on these:

- File name colour is determined only by Git status, the diagnostic
badges remain separate. Should diagnostics also affect the filename
colour?
- (Unstaged) Modified files and staged modifications share the same
colour, in vscode staged modifications use a brownish colour by default
which I could not find the colours. I think differentiating them is
definetely something to add.

Release Notes

- Added git status indicators in Project Panel. It can be enabled by
setting `git_status_indicator` to `true` in `project_panel` settings.

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Co-authored-by: Smit Barmase <heysmitbarmase@gmail.com>