### What problem does this PR solve?
This PR helps automate the testing of the ui interface using pytest
Playwright
### Type of change
- [x] New Feature (non-breaking change which adds functionality)
- [x] Other (please describe): test automation infrastructure
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Co-authored-by: Liu An <asiro@qq.com>
### What problem does this PR solve?
This PR adds a dedicated HTTP benchmark CLI for RAGFlow chat and
retrieval endpoints so we can measure latency/QPS.
### Type of change
- [x] Documentation Update
- [x] Other (please describe): Adds a CLI benchmarking tool for
chat/retrieval latency/QPS
---------
Co-authored-by: Liu An <asiro@qq.com>
