Integrate SpeechGPT with Lgpilot

[jfResearchEng]

🚀 Feature

This issue is the integration of issue 97 and issue 99, so that user could display LabGraph code in the UI.

Additional context

1. The code should be added at folder is https://github.com/facebookresearch/labgraph/tree/main/extensions/lgpilot
2. Create setup.py and README.md, where example can be found at: https://github.com/facebookresearch/labgraph/tree/main/extensions/labgraph_viz
3. Add github action support, reference: https://github.com/facebookresearch/labgraph/actions/workflows/main.yml
4. Add proper license header.