show curtain in devices and implement dialog for if and then (#263)

last integrate with backend

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## Jira Ticket
[SP-1728](https://syncrow.atlassian.net/browse/SP-1728)

## Description

implement the dialog for CURTAIN and make it appears with devices in
making Routine
integrate it with backend and test it 
## Type of Change

<!--- Put an `x` in all the boxes that apply: -->

- [x] ✨ New feature (non-breaking change which adds functionality)
- [ ] 🛠️ Bug fix (non-breaking change which fixes an issue)
- [ ] ❌ Breaking change (fix or feature that would cause existing
functionality to change)
- [ ] 🧹 Code refactor
- [ ] ✅ Build configuration change
- [ ] 📝 Documentation
- [ ] 🗑️ Chore 


[SP-1728]:
https://syncrow.atlassian.net/browse/SP-1728?atlOrigin=eyJpIjoiNWRkNTljNzYxNjVmNDY3MDlhMDU5Y2ZhYzA5YTRkZjUiLCJwIjoiZ2l0aHViLWNvbS1KU1cifQ

lib/pages/routines/models/curtain/curtain_function.dart

@@ -0,0 +1,49 @@
+import 'package:syncrow_web/pages/device_managment/curtain/model/curtain_model.dart';
+import 'package:syncrow_web/pages/routines/models/curtain/curtain_opertion_value.dart';
+import 'package:syncrow_web/pages/routines/models/device_functions.dart'
+    show DeviceFunction;
+import 'package:syncrow_web/utils/constants/app_enum.dart';
+import 'package:syncrow_web/utils/constants/assets.dart';
+
+abstract class CurtainFunction extends DeviceFunction<CurtainModel> {
+  final String type;
+  CurtainFunction({
+    required super.deviceId,
+    required super.deviceName,
+    required this.type,
+    required super.code,
+    required super.operationName,
+    required super.icon,
+  });
+  List<CurtainOperationalValue> getOperationalValues();
+}
+
+class ControlCurtainFunction extends CurtainFunction {
+  ControlCurtainFunction({
+    required super.deviceId,
+    required super.deviceName,
+    required super.type,
+    super.code = 'control',
+    super.operationName = 'Control',
+    super.icon = Assets.curtain,
+  });
+
+  @override
+  List<CurtainOperationalValue> getOperationalValues() => [
+        CurtainOperationalValue(
+          icon: Assets.curtain,
+          description: 'OPEN',
+          value: 'open',
+        ),
+        CurtainOperationalValue(
+          icon: Assets.curtain,
+          description: 'STOP',
+          value: 'stop',
+        ),
+        CurtainOperationalValue(
+          icon: Assets.curtain,
+          description: 'CLOSE',
+          value: 'close',
+        )
+      ];
+}

lib/pages/routines/models/curtain/curtain_opertion_value.dart

@@ -0,0 +1,11 @@
+class CurtainOperationalValue {
+  final String icon;
+  final String description;
+  final String value;
+
+  CurtainOperationalValue({
+    required this.icon,
+    required this.description,
+    required this.value,
+  });
+}