Replace the legacy sync:bunny flags with an interactive CDN sync flow for service templates and release metadata. Serve official service templates from the Coollabs CDN, update version metadata, and remove obsolete helper scripts.
Drop the unused GitHub release and version sync options from sync:bunny,
leaving the command focused on BunnyCDN template, release, and nightly syncs.
Update the nightly test to assert it does not invoke gh or git.
