chore: inject HF metadata for widgets-api/llm-calculator

✨ Implement model gateway with Llama model integration and /generate API endpoint

🐛 Fix llm calculator's api decorator

🐛 Add app.launch() to start the Gradio server

🔧 Update llm-calculator sdk_version to 6.13.0

➕ Add accelerate to llm calculator

:tada: Initial commit with llm-calculator server