outsource drawer context in seperate files

lib/utils/platform.dart

@@ -0,0 +1,23 @@
+import 'dart:io';
+
+import 'package:device_info_plus/device_info_plus.dart';
+import 'package:flutter/cupertino.dart';
+import 'package:flutter/foundation.dart';
+
+bool _isTV = false;
+
+bool isDesktop() {
+  return (Platform.isLinux || Platform.isWindows || Platform.isMacOS) &&
+      !kIsWeb;
+}
+
+Future<void> loadDeviceInfo() async {
+  WidgetsFlutterBinding.ensureInitialized();
+  DeviceInfoPlugin deviceInfo = DeviceInfoPlugin();
+  AndroidDeviceInfo androidInfo = await deviceInfo.androidInfo;
+  _isTV = androidInfo.systemFeatures.contains('android.software.leanback_only');
+}
+
+bool isTV() {
+  return _isTV;
+}