Fix :This PR can resolve the issue of exceeding the default tool invocation limit by setting the recursion limit through an environment variable.mit (#138)

* set ecursion limit

* set ecursion limit

* fix:check if the recession_limit within a reasonalbe range

* style: format code with black

.env.example

@@ -5,6 +5,8 @@ APP_ENV=development
 # docker build args
 NEXT_PUBLIC_API_URL="http://localhost:8000/api"
 
+AGENT_RECURSION_LIMIT=30
+
 # Search Engine, Supported values: tavily (recommended), duckduckgo, brave_search, arxiv
 SEARCH_API=tavily
 TAVILY_API_KEY=tvly-xxx