docs: update README logo to app icon and update dashboard screenshot

Author: CalaKuad1

README.md

@@ -1,5 +1,5 @@
 <div align="center">
-  <img src="electron-app/public/images/logo2.png" alt="Logo" width="200">
+  <img src="electron-app/public/images/icon.ico" alt="Logo" width="200">
 
   <h1>Minecraft Local Server GUI</h1>