chore: import upstream snapshot with attribution

examples/integrations/llamaindex/agent/main.py

@@ -0,0 +1,24 @@
+import uvicorn
+from dotenv import load_dotenv
+from fastapi import FastAPI
+
+from src.agent import agentic_chat_router
+
+app = FastAPI()
+
+
+@app.get("/health")
+async def health():
+    return {"status": "ok"}
+
+
+app.include_router(agentic_chat_router)
+
+
+def main():
+    load_dotenv()
+    uvicorn.run("main:app", host="127.0.0.1", port=9000, reload=True)
+
+
+if __name__ == "__main__":
+    main()