Add gitea-shim integration and update workflow services

gitea-shim/python/models/__init__.py

@@ -0,0 +1,7 @@
+"""Model classes for Gitea GitHub shim."""
+
+from .repository import Repository
+from .pull_request import PullRequest
+from .user import User
+
+__all__ = ['Repository', 'PullRequest', 'User']