chore(wip): upgrade dependencies, begin refactor

frontend/lib/domain/entities/trip.dart

@@ -0,0 +1,19 @@
+import 'package:anyway/domain/entities/landmark.dart';
+import 'package:freezed_annotation/freezed_annotation.dart';
+
+part 'trip.freezed.dart';
+part 'trip.g.dart';
+
+
+@Freezed(makeCollectionsUnmodifiable: false)
+abstract class Trip with _$Trip {
+
+  const factory Trip({
+    required String uuid,
+    // Duration totalTime,
+    required List<Landmark> landmarks,
+  }) = _Trip;
+
+  factory Trip.fromJson(Map<String, Object?> json) => _$TripFromJson(json);
+
+}