refactor: rebuild using drift instead of isar

lib/src/shared/data/local/app_database.dart

@@ -0,0 +1,32 @@
+import 'dart:io';
+import 'package:drift/drift.dart';
+import 'package:drift/native.dart';
+import 'package:path_provider/path_provider.dart';
+import 'package:path/path.dart' as p;
+import 'tables.dart';
+import 'converters/json_converter.dart';
+
+part 'app_database.g.dart';
+
+@DriftDatabase(tables: [Users, Cycles, Workouts])
+class AppDatabase extends _$AppDatabase {
+  AppDatabase() : super(_openConnection());
+
+  @override
+  int get schemaVersion => 1;
+
+  @override
+  MigrationStrategy get migration => MigrationStrategy(
+        onCreate: (Migrator m) async {
+          await m.createAll();
+        },
+      );
+}
+
+LazyDatabase _openConnection() {
+  return LazyDatabase(() async {
+    final dbFolder = await getApplicationDocumentsDirectory();
+    final file = File(p.join(dbFolder.path, 'slrpg.sqlite'));
+    return NativeDatabase.createInBackground(file);
+  });
+}