docs: Add Git page (#14582)

This PR adds a basic Git page to the docs so that we have somewhere to
link to from the Git upsell within Zed.

Release Notes:

- N/A
0556eddc21Marshall Bowers committed on 7/16/2024, 4:47:18 PM· committed by GitHubparent09c497f
3 files changedLine totals unavailable