v1.58.5: feat: add `--openapi-emit-tags` flag to gen client
Endpoint tags declared via tags: [...] in the API definition are currently only used to filter which endpoints are included when generating clients. They never appear in the generated output. This adds an opt-in --openapi-emit-tags flag to encore gen client. When set with --lang=openapi, each operation is emitted with its endpoint tags verbatim, and a sorted document-level tags list of every tag i…