Add component WenCai (#2269)

### What problem does this PR solve?

### Type of change

- [x] New Feature (non-breaking change which adds functionality)

agent/component/__init__.py

@@ -23,6 +23,7 @@ from .baidufanyi import BaiduFanyi, BaiduFanyiParam
 from .qweather import QWeather, QWeatherParam
 from .exesql import ExeSQL, ExeSQLParam
 from .yahoofinance import YahooFinance, YahooFinanceParam
+from .wencai import WenCai, WenCaiParam
 
 
 def component_class(class_name):