docs: update README to include project description, acknowledgements, and formatting changes

Author: yumao233

README.md

@@ -1,4 +1,22 @@
-### MCSManager 飞牛端
+## MCSManager fnOS Package
+
+Source code repository: [MCSManager Github](https://github.com/MCSManager/MCSManager)
+
+<br />
+
+### What is this?
+
+This is an installation package of MCSManager for fnOS (a NAS system) tailored for the Chinese market.
+
+<br />
+
+### Acknowledgements
+
+Special thanks to the developer **@Flex_7746** for helping MCSManager complete the initial adaptation.
+
+<br />
+
+## MCSManager 飞牛端
 
 源代码仓库：[MCSManager Github](https://github.com/MCSManager/MCSManager)