Add Swift 6.2 badge to README

Author: macOS26

README.md

@@ -10,6 +10,7 @@
 [![GitHub Stars](https://img.shields.io/github/stars/macOS26/Agent?style=for-the-badge&logo=github&label=Stars&color=hotpink)](https://github.com/macOS26/Agent/stargazers)
 [![GitHub Forks](https://img.shields.io/github/forks/macOS26/Agent?style=for-the-badge&logo=github&label=Forks&color=white)](https://github.com/macOS26/Agent/fork)
 [![macOS 26+](https://img.shields.io/badge/macOS-26%2B-purple?style=for-the-badge)](https://github.com/apple)
+[![Swift 6.2](https://img.shields.io/badge/Swift-6.2-orange?style=for-the-badge)](https://www.swift.org)
 </div>
 
 ## What's New 🚀