Add main menu screenshot to README

Author: SamNet-dev

README.md

@@ -17,6 +17,8 @@
 
 MTProxyMax is a full-featured Telegram MTProto proxy manager powered by the **telemt 3.x Rust engine**. It wraps the raw proxy engine with an interactive TUI, a complete CLI, a Telegram bot for remote management, per-user access control, traffic monitoring, proxy chaining, and automatic updates — all in a single bash script.
 
+![MTProxyMax Main Menu](main.png)
+
 ```bash
 sudo bash -c "$(curl -fsSL https://raw.githubusercontent.com/SamNet-dev/MTProxyMax/main/install.sh)"
 ```