created tables

lib/data/tables/match_table.dart

@@ -0,0 +1,12 @@
+import 'package:drift/drift.dart';
+import 'game_table.dart';
+import 'group_table.dart';
+
+class MatchTable extends Table {
+  TextColumn get id => text()();
+  IntColumn get gameId => integer().references(GameTable, #id)();
+  TextColumn get groupId => text().nullable().references(GroupTable, #id)();
+
+  @override
+  Set<Column<Object>> get primaryKey => {id};
+}