Add whitelist_actions_user rule to all branch protection definitions so
the mokogitea-actions bot is automatically whitelisted for push access
when sync_rulesets.php runs. Updated MokoGiteaAdapter to pass
push_whitelist_actions_user and merge_whitelist_actions_user through
to the Gitea API.
Co-Authored-By: Claude Opus 4.6 (1M context) <noreply@anthropic.com>