enhance: Support for Chinese Documentation (sub pr 1) (#3091)

Co-authored-by: Wendong-Fan <133094783+Wendong-Fan@users.noreply.github.com>

Author: OmCheeLin

README.md

@@ -20,6 +20,9 @@
 
 <a href="https://trendshift.io/repositories/649" target="_blank"><img src="https://trendshift.io/api/badge/repositories/649" alt="camel-ai/camel | Trendshift" style="width: 250px; height: 55px;" width="250" height="55"/></a>
 
+[English](README.md) |
+[简体中文](README.zh.md)
+
 </div>