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

lib/features/debug/screens/theme_screen.dart

@@ -0,0 +1,40 @@
+import 'package:flutter/material.dart';
+import 'package:friflex_starter/app/app_context_ext.dart';
+import 'package:friflex_starter/app/theme/app_colors_scheme.dart';
+
+/// {@template ThemeScreen}
+///  Экран для отладки темы приложения
+/// {@endtemplate}
+class ThemeScreen extends StatelessWidget {
+  /// {@macro ThemeScreen}
+  const ThemeScreen({super.key});
+
+  @override
+  Widget build(BuildContext context) {
+    return Scaffold(
+      appBar: AppBar(title: const Text('Theme')),
+      body: Center(
+        child: ListView(
+          padding: const EdgeInsets.all(16),
+          children: [
+            ElevatedButton(
+              onPressed: () {
+                context.theme.changeTheme();
+              },
+              child: const Text('Сменить тему'),
+            ),
+            const SizedBox(height: 16),
+            ColoredBox(
+              color: context.colors.testColor,
+              child: const SizedBox(height: 100, width: 100),
+            ),
+            const SizedBox(height: 16),
+            Text(
+              'Текущая тема: ${context.theme.themeMode}',
+            ),
+          ],
+        ),
+      ),
+    );
+  }
+}