* feat: enhance integration testing for specific plugins
- Added integration tests for the official agent, including test data for agent strategy invocation.
- Introduced JSON schema generation and validation utilities to ensure proper request formatting.
- Enhanced mock invocation handling in the plugin manager to support tool parameters.
- Added new test utilities for simulating OpenAI server responses and managing plugin runtime.
* fix: update RunOnce function to return response stream and enhance integration test
- Modified the RunOnce function to return a response stream instead of an error, allowing for better handling of streamed responses.
- Updated the integration test for the official agent to read from the response stream, ensuring proper validation of the agent strategy invocation.