Add terminal UI and update README

README.md

@@ -110,3 +110,26 @@ db      192.168.1.20    root
 * Lines starting with `#` are ignored
 * Empty lines are ignored
 * Requires passwordless SSH access
+
+🖥️ Terminal UI
+
+You can also use the interactive terminal menu:
+
+update-manager-ui
+Features
+
+Check all hosts
+
+View hosts file
+
+Edit hosts file
+
+Add host
+
+Remove host
+
+Requirements
+
+The UI uses whiptail. Install it if needed:
+
+sudo apt update && sudo apt install whiptail -y