DemoKit is a compact public package used to validate VersionedDocC against GitHub Pages and GHCR.
The documentation workflow discovers the two latest semantic-version tags and
the current main branch automatically. Release documentation is cached as
independent OCI artifacts in ghcr.io/openswiftuiproject/demokit-docc-cache.
The public API intentionally includes two implementations of P. Version
0.2.0 adds a protocol-extension member so the generated API comparison can
verify that inherited protocol implementations are not repeated for every
conforming type.