push add ac fucntions and handle doplicate adding to the then or if items

lib/pages/routiens/models/device_functions.dart

@@ -0,0 +1,17 @@
+abstract class DeviceFunction<T> {
+  final String deviceId;
+  final String deviceName;
+  final String code;
+  final String operationName;
+  final String icon;
+
+  DeviceFunction({
+    required this.deviceId,
+    required this.deviceName,
+    required this.code,
+    required this.operationName,
+    required this.icon,
+  });
+
+  T execute(T currentStatus, dynamic newValue);
+}