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/crawl.py

@@ -5,10 +5,11 @@ import logging
 from typing import Annotated
 
 from langchain_core.tools import tool
-from .decorators import log_io
 
 from src.crawler import Crawler
 
+from .decorators import log_io
+
 logger = logging.getLogger(__name__)