feat: Implement Windows runner for Flutter application

- Added FlutterWindow class to manage the Flutter view within a Win32 window.
- Created main entry point in main.cpp to initialize and run the Flutter application.
- Implemented utility functions for console attachment and command line argument parsing.
- Added resource management for application icon and manifest.
- Enhanced Win32Window class for DPI awareness and theme management.
- Included necessary headers and resource files for building the Windows runner.

lib/services/wizard_preferences.dart

@@ -0,0 +1,42 @@
+import 'package:shared_preferences/shared_preferences.dart';
+
+/// Service to manage welcome wizard preferences and state
+class WizardPreferences {
+  static const String _wizardCompletedKey = 'wizard_completed';
+  static const String _wizardVersionKey = 'wizard_version';
+  static const int _currentWizardVersion = 1;
+
+  /// Check if the welcome wizard has been completed
+  static Future<bool> isWizardCompleted() async {
+    final prefs = await SharedPreferences.getInstance();
+    final completed = prefs.getBool(_wizardCompletedKey) ?? false;
+    final version = prefs.getInt(_wizardVersionKey) ?? 0;
+
+    // Re-show wizard if version has changed (for major updates)
+    return completed && version >= _currentWizardVersion;
+  }
+
+  /// Mark the welcome wizard as completed
+  static Future<void> setWizardCompleted(bool completed) async {
+    final prefs = await SharedPreferences.getInstance();
+    await prefs.setBool(_wizardCompletedKey, completed);
+
+    if (completed) {
+      // Store current version when wizard is completed
+      await prefs.setInt(_wizardVersionKey, _currentWizardVersion);
+    }
+  }
+
+  /// Get the wizard version last shown to the user
+  static Future<int> getWizardVersion() async {
+    final prefs = await SharedPreferences.getInstance();
+    return prefs.getInt(_wizardVersionKey) ?? 0;
+  }
+
+  /// Reset wizard state (useful for testing or re-showing tutorial)
+  static Future<void> resetWizard() async {
+    final prefs = await SharedPreferences.getInstance();
+    await prefs.setBool(_wizardCompletedKey, false);
+    await prefs.setInt(_wizardVersionKey, 0);
+  }
+}