As a user I can add Manifests to a repository, and any Blobs that are a part of them
This story will be complete when a user can add one or many Manifests to a repository, and the blobs referenced by each manifest are also added to the repository.
This story falls under the category of "rich copy" and will need a new API endpoint.
Before this story is groomed we should determine where that endpoint will live. If this recursive copy needs any importer settings it would make sense to be a detail route (like sync) on the importer.
If not, we would have to come up with somewhere else. In theory, we can register a new ViewSet wherever we want, so I'd recommend starting with a docker namespace.