Update GitHub Repo mapping when Repos are moved or renamed

GitHub makes it easy to rename and/or move a repository to a new owner / organization. In the UI (and all git tools) it smoothly handles this for users, automatically redirecting you to the new location. As a result, people move projects on a fairly regular basis.

When a user does this, it breaks the Aha <> GitHub integration and throws an error about access permissions (when the reality is that Aha can't find the GitHub Repository to connect with).

Please update the error handling to provide a better message and update the code to handle the redirects that GitHub provides...