refactor(full refactor): Рефакторинг стартера (#8)

lib/features/debug/screens/tokens_screen.dart

@@ -0,0 +1,31 @@
+import 'package:flutter/material.dart';
+
+/// {@template TokensScreen}
+///  Экран для отображения токенов
+/// {@endtemplate}
+class TokensScreen extends StatelessWidget {
+  /// {@macro TokensScreen}
+  const TokensScreen({super.key});
+
+  @override
+  Widget build(BuildContext context) {
+    return Scaffold(
+      appBar: AppBar(title: const Text('Tokens')),
+      body: Center(
+        child: ListView(
+          padding: const EdgeInsets.all(16),
+          children: const [
+            Text(
+              'Access Token: ',
+            ),
+            SizedBox(height: 16),
+            Text(
+              'Refresh Token: ',
+            ),
+            SizedBox(height: 16),
+          ],
+        ),
+      ),
+    );
+  }
+}