PR-Codex overview

This PR focuses on adding test cases for the handle_action_end function in the chat/tests/test_chat_function.py file.

Detailed summary

• Added a test case for handling the end of an action with a large number of output files.
• Added a smoke test case for handling the end of an action.
• Added an error handling test case for handling the end of an action.
• Added a performance test case for handling the end of an action with a large number of responses.

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