update readme

Author: pompurin404

README.md

@@ -9,4 +9,11 @@
   <a href="https://github.com/pompurin404/mihomo-party/releases">
     <img src="https://img.shields.io/github/release/pompurin404/mihomo-party/all.svg">
   </a>
+  <a href="https://t.me/mihomo_party">
+    <img src="https://img.shields.io/badge/Telegram-group-blue?logo=telegram">
+  </a>
 </p>
+
+<div align="center">
+  <img src="images/preview.png" alt="Mihomo Party" width="80%">
+</div>