Implemented basic structure

lib/data/dao/player_dao.dart

@@ -0,0 +1,33 @@
+import 'package:drift/drift.dart';
+import 'package:game_tracker/data/db/database.dart';
+import 'package:game_tracker/data/db/tables/player_table.dart';
+import 'package:game_tracker/data/dto/player.dart';
+
+part 'player_dao.g.dart';
+
+@DriftAccessor(tables: [PlayerTable])
+class PlayerDao extends DatabaseAccessor<AppDatabase> with _$PlayerDaoMixin {
+  PlayerDao(super.db);
+
+  Future<List<Player>> getAllUsers() async {
+    return await select(UserTable).get();
+  }
+
+  Future<UserData> getUserById(String id) async {
+    return await (select(user)..where((u) => u.id.equals(id))).getSingle();
+  }
+
+  Future<void> addUser(String id, String name) async {
+    await into(user).insert(UserCompanion.insert(id: id, name: name));
+  }
+
+  Future<void> deleteUser(String id) async {
+    await (delete(user)..where((u) => u.id.equals(id))).go();
+  }
+
+  Future<void> updateUsername(String id, String newName) async {
+    await (update(user)..where((u) => u.id.equals(id))).write(
+      UserCompanion(name: Value(newName)),
+    );
+  }
+}