Adds an ipc command to turn monitors on / off

Services/Control/IPCService.qml

@@ -403,6 +403,16 @@ Singleton {
     }
   }
 
+  IpcHandler {
+    target: "monitors"
+    function on() {
+      CompositorService.turnOnMonitors();
+    }
+    function off() {
+      CompositorService.turnOffMonitors();
+    }
+  }
+
   IpcHandler {
     target: "darkMode"
     function toggle() {