doc: Update README.md

Author: jaywcjlove

core/README.md

@@ -1,6 +1,8 @@
 react-xml-reader
 ===
 
+[![Buy me a coffee](https://img.shields.io/badge/Buy_Me_a_Coffee-ffdd00?logo=buy-me-a-coffee&logoColor=black)](https://jaywcjlove.github.io/#/sponsor)
+[![Follow On X](https://img.shields.io/badge/Follow%20on%20X-333333?logo=x&logoColor=white)](https://x.com/jaywcjlove)
 [![CI](https://github.com/uiwjs/react-xml-reader/actions/workflows/ci.yml/badge.svg)](https://github.com/uiwjs/react-xml-reader/actions/workflows/ci.yml)
 [![npm version](https://img.shields.io/npm/v/@uiw/react-xml-reader.svg)](https://www.npmjs.com/package/@uiw/react-xml-reader)
 [![NPM Downloads](https://img.shields.io/npm/dm/@uiw/react-xml-reader.svg?style=flat&label=)](https://www.npmjs.com/package/@uiw/react-xml-reader)