Move createCliPlugin and related types from the standalone
@backstage/cli-plugin-api package into @backstage/cli-node and
remove the now-empty package.
Signed-off-by: Patrik Oldsberg <poldsberg@gmail.com>
Made-with: Cursor
Move OpaqueCliPlugin to a new @internal/cli inline package, following the
same pattern as @internal/frontend. Both cli-plugin-api and cli import it
directly, and it gets bundled into their dists at build time.
Signed-off-by: Patrik Oldsberg <poldsberg@gmail.com>
Made-with: Cursor