bf8e936774
SkillMetadata + SkillManifest zod schemas alongside the existing task/prompt ones. registerSkillMetadata / listSkillManifests / getSkillManifest on ResourceCatalog (both Standard and Noop), wired through the ResourceCatalogAPI facade. BuildManifest + WorkerManifest gain an optional `skills` array so the built-in CLI bundler can annotate discoveries and the indexer can report them. Part 1/3 of Phase 1 for the new ai.skills primitive.