Allow user to deploy using self managed git repo from rill developer. We detect the git repo, branch and subpath where the project has been started and use it to create the project.

• Add GitRepoStatus API to get git repo access status by forwarding the call to admin server.
• Update GitStatus to get the repo, branch and subpath.
• Use GitStatus in rill-dev to show a confirmation for using self managed or rill managed.
• Tweak the above based on product feedback.
• Use GitRepoStatus to ask for repo access.

Checklist:

• Covered by tests
• Ran it and it works as intended
• Reviewed the diff before requesting a review
• Checked for unhandled edge cases
• Linked the issues it closes
• Checked if the docs need to be updated. If so, create a separate Linear DOCS issue
• Intend to cherry-pick into the release branch
• I'm proud of this work!