feat: 1. replace black with ruff for fomatting and sort import (#489)

2. use tavily from`langchain-tavily` rather than the older one from `langchain-community`

Co-authored-by: Willem Jiang <willem.jiang@gmail.com>

src/tools/tts.py

@@ -6,10 +6,11 @@ Text-to-Speech module using volcengine TTS API.
 """
 
 import json
-import uuid
 import logging
+import uuid
+from typing import Any, Dict, Optional
+
 import requests
-from typing import Optional, Dict, Any
 
 logger = logging.getLogger(__name__)