feat: Add complete multilingual README support with quality automation

- Add README-zh.md with full Chinese translation
- Add README-ja.md with full Japanese translation
- Update README.md with professional language selector
- Add GitHub Actions workflow for README quality checks

README.md

@@ -22,6 +22,18 @@
   </a>
 </p>
 
+<p align="center">
+  <a href="README.md">
+    <img src="https://img.shields.io/badge/🇺🇸_English-blue" alt="English">
+  </a>
+  <a href="README-zh.md">
+    <img src="https://img.shields.io/badge/🇨🇳_中文-red" alt="中文">
+  </a>
+  <a href="README-ja.md">
+    <img src="https://img.shields.io/badge/🇯🇵_日本語-green" alt="日本語">
+  </a>
+</p>
+
 <p align="center">
   <a href="#-quick-installation">Quick Start</a> •
   <a href="#-support-the-project">Support</a> •