add subspace and space information

lib/pages/device_managment/all_devices/models/device_subspace.model.dart

@@ -0,0 +1,47 @@
+class DeviceSubspace {
+  final String uuid;
+  final DateTime? createdAt;
+  final DateTime? updatedAt;
+  final String subspaceName;
+  final bool disabled;
+
+  DeviceSubspace({
+    required this.uuid,
+    this.createdAt,
+    this.updatedAt,
+    required this.subspaceName,
+    required this.disabled,
+  });
+
+  factory DeviceSubspace.fromJson(Map<String, dynamic> json) {
+    return DeviceSubspace(
+      uuid: json['uuid'] as String,
+      createdAt: json['createdAt'] != null
+          ? DateTime.tryParse(json['createdAt'].toString())
+          : null,
+      updatedAt: json['updatedAt'] != null
+          ? DateTime.tryParse(json['updatedAt'].toString())
+          : null,
+      subspaceName: json['subspaceName'] as String,
+      disabled: json['disabled'] as bool,
+    );
+  }
+
+  Map<String, dynamic> toJson() {
+    return {
+      'uuid': uuid,
+      'createdAt': createdAt?.toIso8601String(),
+      'updatedAt': updatedAt?.toIso8601String(),
+      'subspaceName': subspaceName,
+      'disabled': disabled,
+    };
+  }
+
+  static List<DeviceSubspace> listFromJson(List<dynamic> jsonList) {
+    return jsonList.map((json) => DeviceSubspace.fromJson(json)).toList();
+  }
+
+  static List<Map<String, dynamic>> listToJson(List<DeviceSubspace> subspaces) {
+    return subspaces.map((subspace) => subspace.toJson()).toList();
+  }
+}