update readme

Author: machineily

README.md

@@ -268,3 +268,8 @@ If you encounter any issues, please:
 For questions, feedback, or collaboration opportunities, please contact:
 
 **Email**: [[email protected]](mailto:[email protected]) 
+
+
+## Star History
+
+[![Star History Chart](https://api.star-history.com/svg?repos=Y-Research-SBU/QuantAgent&type=Date)](https://www.star-history.com/#Y-Research-SBU/QuantAgent&Date)

README_CN.md

@@ -264,3 +264,7 @@ python web_interface.py
 如有问题、反馈或合作机会，请联系：
 
 **邮箱**：[[email protected]](mailto:[email protected])
+
+## Star History
+
+[![Star History Chart](https://api.star-history.com/svg?repos=Y-Research-SBU/QuantAgent&type=Date)](https://www.star-history.com/#Y-Research-SBU/QuantAgent&Date)