Add the Git-sourced creation path so apify create hands the local scaffold to a provider. The full flow is in the Epic.

• Add --source apify|github|gitlab|bitbucket (default apify) and --git-repo owner/name.
• Implement the connect flow: scaffold locally, have the Apify platform create the repo and Actor, then push.
• Keep it provider-agnostic (the browser does the auth) and non-interactive when already authorized.
• ... see parent epic for additional context.

Out of scope: registering an existing repo (the mirroring command of Import from Git button).