Fix agenthub import (#123)

* fix agenthub import

* add noqa

opendevin/main.py

@@ -2,6 +2,7 @@ from typing import Type
 import asyncio
 import argparse
 
+import agenthub # noqa F401 (we import this to get the agents registered)
 from opendevin.agent import Agent
 from opendevin.controller import AgentController