refactor(mobile): server info to use data classes instead of dtos (#4591)

* refactor: server info model to use data classes instead of dtos

* mobile: add return types and refactor private variables in map / stack

---------

Co-authored-by: shalong-tanwen <139912620+shalong-tanwen@users.noreply.github.com>

mobile/lib/shared/models/server_info/server_features.model.dart

@@ -0,0 +1,42 @@
+import 'package:openapi/api.dart';
+
+class ServerFeatures {
+  final bool trash;
+  final bool map;
+
+  const ServerFeatures({
+    required this.trash,
+    required this.map,
+  });
+
+  ServerFeatures copyWith({
+    bool? trash,
+    bool? map,
+  }) {
+    return ServerFeatures(
+      trash: trash ?? this.trash,
+      map: map ?? this.map,
+    );
+  }
+
+  @override
+  String toString() {
+    return 'ServerFeatures(trash: $trash, map: $map)';
+  }
+
+  ServerFeatures.fromDto(ServerFeaturesDto dto)
+      : trash = dto.trash,
+        map = dto.map;
+
+  @override
+  bool operator ==(Object other) {
+    if (identical(this, other)) return true;
+
+    return other is ServerFeatures && other.trash == trash && other.map == map;
+  }
+
+  @override
+  int get hashCode {
+    return trash.hashCode ^ map.hashCode;
+  }
+}