Add Windows runner files for high DPI support and console output

- Created runner.exe.manifest to enable DPI awareness and dark mode support.
- Implemented utility functions in utils.cpp and utils.h for console creation and command line argument handling.
- Developed Win32Window class in win32_window.cpp and win32_window.h to manage high DPI-aware windows, including theme updates and message handling.

lib/theme/app_theme.dart

@@ -0,0 +1,18 @@
+import 'package:flutter/material.dart';
+
+class AppTheme {
+  static ThemeData get theme {
+    return ThemeData(
+      useMaterial3: true,
+      scaffoldBackgroundColor: const Color.fromRGBO(31, 32, 33, 1),
+      colorScheme: ColorScheme.fromSeed(
+        seedColor: Colors.amber,
+        brightness: Brightness.dark,
+      ),
+      floatingActionButtonTheme: const FloatingActionButtonThemeData(
+        backgroundColor: Colors.amber,
+        foregroundColor: Colors.black,
+      ),
+    );
+  }
+}