Feature highlight: Push to a remote repository

Introduced the 'Push to remote repository' functionality for GitLab Enterprise Edition, enabling users to push changes from a GitLab repository to an external repository. This complements the existing 'sync from remote repository' feature, allowing GitLab to act as a central hub for development with synchronization to other services. The setup is configurable in Settings -> Mirror Repository and can be triggered manually or automatically every hour. An experimental chain of three repositories (Bitbucket -> GitLab -> GitHub) was demonstrated to showcase the functionality.