Replace README.md

README.md

-# csst_cpic_sim
+<img alt="*logo.png" src="logo.png" width="50%" height="50%">
+
+# CpicImgSim
+
+CpicImgSim is a Python library for numerical simulation of the observational images of CSST/CPIC instrument.
+
+## Insallation - 安装
+
+### Requirements - 必要条件
+
+- Python 3.8+
+
+## Usage - 用法
+
+## Development - 开发
+
+## Contributing - 贡献
+
+## Support - 支持
+
+## Citation - 引用
+
+## License - 许可证
+
+## Change Log - 更新日志