Create a scheming registry

And maybe, making it a bit meta - using CKAN to catalog scheming schemas created by the community :)

Since you can specify URLs when defining schemas, maybe even enforce a convention (using scheming?) to point to different versions of a schema.

Start by reviewing the existing schema definition and URL-handling entry points in the repository, then inspect CKAN extension conventions for cataloging shared resources. The issue does not identify files, tests, a registry format, or versioning rules, so the work is not complete until those design decisions and acceptance criteria are established.

Written by the indexing model from the issue text.