Added option to show folders always on top in files

lib/storage/file/fileSettings.dart

@@ -0,0 +1,13 @@
+import 'package:json_annotation/json_annotation.dart';
+
+part 'fileSettings.g.dart';
+
+@JsonSerializable()
+class FileSettings {
+  bool sortFoldersToTop;
+
+  FileSettings({required this.sortFoldersToTop});
+
+  factory FileSettings.fromJson(Map<String, dynamic> json) => _$FileSettingsFromJson(json);
+  Map<String, dynamic> toJson() => _$FileSettingsToJson(this);
+}