Adding a queue

1. Implement the language adapter (see the language README).
2. Register the name exactly as it will appear in LibraryName.
3. Report the installed package/crate version in LibraryVersion.
4. Implement SPSC. Implement MPMC only if the library is actually MPMC; otherwise skip MPMC cells (CSV io_mode=stream). Set communication to thread or async in config/benchmark_config.yaml. If the library cannot bound (maxsize), set supports_bounded = False so backpressure cells are skipped. Do not register a concurrency limiter as an async handoff queue.
5. Add the inventory row under languages.<id>.queues in config/benchmark_config.yaml.
6. Add a dependency pin (uv / cargo / npm / csproj / cmake).
7. Document it on docs/<lang>/index.md.
8. Smoke, then all-single, then analyze-benchmarks -l <lang>.