added circular border

lib/pages/device_managment/all_devices/models/device_type_model.dart

@@ -0,0 +1,22 @@
+class DeviceTypeModel {
+  final String name;
+  final String icon;
+
+  DeviceTypeModel({required this.name, required this.icon});
+
+  // Factory method for creating a new DeviceTypeModel from JSON
+  factory DeviceTypeModel.fromJson(Map<String, dynamic> json) {
+    return DeviceTypeModel(
+      name: json['name'],
+      icon: json['icon'],
+    );
+  }
+
+  // Convert this model to JSON format
+  Map<String, dynamic> toJson() {
+    return {
+      'name': name,
+      'icon': icon,
+    };
+  }
+}