Merge remote-tracking branch 'origin/feature/29-timestamp-zu-allen-objekten-hinzufügen' into feature/31-json-import-fuer-testdaten

# Conflicts:
#	lib/data/dao/game_dao.dart
#	lib/data/db/database.g.dart
#	lib/data/db/tables/game_table.dart
#	lib/data/dto/game.dart
#	pubspec.yaml

lib/data/db/tables/game_table.dart

@@ -4,6 +4,7 @@ class GameTable extends Table {
   TextColumn get id => text()();
   TextColumn get name => text()();
   late final winnerId = text().nullable()();
+  DateTimeColumn get createdAt => dateTime()();
 
   @override
   Set<Column<Object>> get primaryKey => {id};