Renamed websearch tool and added import to app.py

tools/web_search.py

@@ -2,7 +2,7 @@ from typing import Any, Optional
 from smolagents.tools import Tool
 import ddgs
 
-class ddgs(Tool):
+class web_search(Tool):
     name = "web_search"
     description = "Performs a duckduckgo web search based on your query (think a Google search) then returns the top search results."
     inputs = {'query': {'type': 'string', 'description': 'The search query to perform.'}}