feat: space opus

Closes #833

Signed-off-by: bggRGjQaUbCoE <githubaccount56556@proton.me>

lib/models/space_opus/data.dart

@@ -0,0 +1,26 @@
+import 'package:PiliPlus/models/space_opus/item.dart';
+
+class SpaceOpusData {
+  bool? hasMore;
+  List<SpaceOpusItemModel>? items;
+  String? offset;
+  int? updateNum;
+
+  SpaceOpusData({this.hasMore, this.items, this.offset, this.updateNum});
+
+  factory SpaceOpusData.fromJson(Map<String, dynamic> json) => SpaceOpusData(
+        hasMore: json['has_more'] as bool?,
+        items: (json['items'] as List<dynamic>?)
+            ?.map((e) => SpaceOpusItemModel.fromJson(e as Map<String, dynamic>))
+            .toList(),
+        offset: json['offset'] as String?,
+        updateNum: json['update_num'] as int?,
+      );
+
+  Map<String, dynamic> toJson() => {
+        'has_more': hasMore,
+        'items': items?.map((e) => e.toJson()).toList(),
+        'offset': offset,
+        'update_num': updateNum,
+      };
+}