Add display toggle but protect against disabling the only active display

bin/omarchy-hyprland-monitor-internal-toggle

@@ -17,6 +17,12 @@ if [[ $DISABLED == "true" ]]; then
   hyprctl keyword monitor "$INTERNAL,preferred,auto,auto"
   notify-send -u low "󰍹    Internal display on"
 else
+  ACTIVE_COUNT=$(hyprctl monitors -j | jq 'length')
+  if [[ $ACTIVE_COUNT -le 1 ]]; then
+    notify-send -u low "󰍹    Can't disable the only active display"
+    exit 1
+  fi
+
   hyprctl keyword monitor "$INTERNAL,disable"
   notify-send -u low "󰍹    Internal display off"
 fi