🎨 Use feature based folder structure

lib/accounts/accounts_models/fortune.dart

@@ -0,0 +1,16 @@
+import 'package:freezed_annotation/freezed_annotation.dart';
+
+part 'fortune.g.dart';
+part 'fortune.freezed.dart';
+
+@freezed
+sealed class SnFortuneSaying with _$SnFortuneSaying {
+  const factory SnFortuneSaying({
+    required String content,
+    required String source,
+    required String language,
+  }) = _SnFortuneSaying;
+
+  factory SnFortuneSaying.fromJson(Map<String, dynamic> json) =>
+      _$SnFortuneSayingFromJson(json);
+}