feat: initial commit - Habo habit tracking app

- Complete MVP with Repository Pattern, SQLite storage
- Provider + ChangeNotifier state management
- Navigation 2.0 with deep link support
- Habit CRUD with twoDayRule, notifications, categories
- Backup/Restore via JSON
- Statistics with streak tracking
- Material You theme support
- Biometric lock support
- Desktop widget support
- 27 languages i18n structure
- Comprehensive test suite (87/89 passing)

lib/repositories/repository_factory.dart

@@ -0,0 +1,32 @@
+import 'package:habo/model/habo_model.dart';
+import 'package:habo/repositories/habit_repository.dart';
+import 'package:habo/repositories/event_repository.dart';
+import 'package:habo/repositories/category_repository.dart';
+import 'package:habo/repositories/sqlite_habit_repository.dart';
+import 'package:habo/repositories/sqlite_event_repository.dart';
+import 'package:habo/repositories/sqlite_category_repository.dart';
+
+class RepositoryFactory {
+  final HaboModel _model;
+
+  HabitRepository? _habitRepository;
+  EventRepository? _eventRepository;
+  CategoryRepository? _categoryRepository;
+
+  RepositoryFactory(this._model);
+
+  HabitRepository get habitRepository {
+    _habitRepository ??= SqliteHabitRepository(_model);
+    return _habitRepository!;
+  }
+
+  EventRepository get eventRepository {
+    _eventRepository ??= SqliteEventRepository(_model);
+    return _eventRepository!;
+  }
+
+  CategoryRepository get categoryRepository {
+    _categoryRepository ??= SqliteCategoryRepository(_model);
+    return _categoryRepository!;
+  }
+}