Add donation badges to README

Added donation badges to README for transparency.

README.md

@@ -6,6 +6,9 @@
 
 <!-- ALL-CONTRIBUTORS-BADGE:END -->
 
+[![已捐赠](https://img.shields.io/badge/Donated-CNY%20200.00-brightgreen?style=flat-square)](./DONATIONS.md)
+[![获得赞赏](https://img.shields.io/badge/Received-CNY%20179.92-blue?style=flat-square)](./DONATIONS.md)
+
 MCP for 小红书/xiaohongshu.com。
 
 - 我的博客文章：[haha.ai/xiaohongshu-mcp](https://www.haha.ai/xiaohongshu-mcp)