docs: add Discord invite link to README

Author: 123vivekr

README.md

@@ -15,6 +15,7 @@
     <a href="#installation"><img src="https://img.shields.io/badge/Install-🚀-green?style=for-the-badge" alt="Installation"></a>
     <a href="#usage"><img src="https://img.shields.io/badge/Usage-📖-purple?style=for-the-badge" alt="Usage"></a>
     <a href="#development"><img src="https://img.shields.io/badge/Develop-🛠️-orange?style=for-the-badge" alt="Development"></a>
+    <a href="https://discord.gg/G9g25nj9"><img src="https://img.shields.io/badge/Discord-Join-5865F2?style=for-the-badge&logo=discord&logoColor=white" alt="Discord"></a>
   </p>
 </div>