🧱 Add basis of tencent rtc

lib/database/database.native.dart

@@ -0,0 +1,16 @@
+import 'dart:io';
+
+import 'package:drift/drift.dart';
+import 'package:drift/native.dart';
+import 'package:island/database/drift_db.dart';
+import 'package:path/path.dart' as p;
+import 'package:path_provider/path_provider.dart';
+
+AppDatabase constructDb() {
+  final db = LazyDatabase(() async {
+    final dbFolder = await getApplicationDocumentsDirectory();
+    final file = File(p.join(dbFolder.path, 'solar_network_data.sqlite'));
+    return NativeDatabase(file);
+  });
+  return AppDatabase(db);
+}