* Match SSE for FastGPT (#5168)
* Match SSE for FastGPT
* Modify the judgment
* Optimize logic for SSE transmission
* Refactor imports
* directly use workflowStreamResponse from props
* improve error handling and streamline onStreamData logic
* Refactor API client configuration
* perf: system tool support sse
* update doc
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Co-authored-by: Zhuangzai fa <143257420+ctrlz526@users.noreply.github.com>
