Merge pull request #39 from Linux2010/docs-i18n

docs: add i18n

Author: themanojdesai

README.md

@@ -12,6 +12,11 @@
 [![UV Compatible](https://img.shields.io/badge/UV-Compatible-5C63FF.svg)](https://github.com/astral-sh/uv)
 [![GitHub stars](https://img.shields.io/github/stars/themanojdesai/python-a2a?style=social)](https://github.com/themanojdesai/python-a2a/stargazers)
 
+  <p>
+      <a href="README.md">English</a> | <a href="README_zh.md">简体中文</a> | <a href="README_ja.md">日本語</a> | <a href="README_es.md">Español</a> | <a href="README_de.md">Deutsch</a> | <a href="README_fr.md">Français</a>
+      <!-- Add other languages here like: | <a href="README_de.md">Deutsch</a> -->
+  </p>
+  
 **The Definitive Python Implementation of Google's Agent-to-Agent (A2A) Protocol with Model Context Protocol (MCP) Integration**
 
 </div>