This commit removes legacy App Engine deployment artifacts and updates the Makefile to reflect the successful migration of the `internal-launchpad` service to Cloud Run.
The following changes were made:
- Deleted obsolete permission scripts:
- `fix-appengine-permissions-complete.sh`
- `fix-project-level-permissions.sh`
- `create-missing-repository.sh`
- Removed the `firebase/internal-launchpad/app.yaml` file.
- Updated `firebase.json` to remove the `launchpad` hosting configuration.
These changes streamline the repository, reduce developer confusion, and prevent the accidental use of outdated deployment logic.
