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.

android/app/build.gradle.kts

@@ -0,0 +1,62 @@
+plugins {
+    id("com.android.application")
+    id("kotlin-android")
+    // The Flutter Gradle Plugin must be applied after the Android and Kotlin Gradle plugins.
+    id("dev.flutter.flutter-gradle-plugin")
+}
+
+android {
+    namespace = "com.meshcore.sar.meshcore_sar_app"
+    compileSdk = flutter.compileSdkVersion
+    ndkVersion = flutter.ndkVersion
+
+    // Enable BuildConfig generation
+    buildFeatures {
+        buildConfig = true
+    }
+
+    compileOptions {
+        sourceCompatibility = JavaVersion.VERSION_11
+        targetCompatibility = JavaVersion.VERSION_11
+        // Required by some dependencies (e.g., flutter_local_notifications)
+        // to support Java 8+ APIs on older Android devices.
+        isCoreLibraryDesugaringEnabled = true
+    }
+
+    kotlinOptions {
+        jvmTarget = JavaVersion.VERSION_11.toString()
+    }
+
+    defaultConfig {
+        // TODO: Specify your own unique Application ID (https://developer.android.com/studio/build/application-id.html).
+        applicationId = "com.meshcore.sar.meshcore_sar_app"
+        // You can update the following values to match your application needs.
+        // For more information, see: https://flutter.dev/to/review-gradle-config.
+        minSdk = flutter.minSdkVersion
+        targetSdk = flutter.targetSdkVersion
+        versionCode = flutter.versionCode
+        versionName = flutter.versionName
+
+        // Inject commit hash from environment variable (set by GitHub Actions)
+        // Falls back to "dev" for local development builds
+        val commitHash = System.getenv("COMMIT_HASH") ?: "dev"
+        buildConfigField("String", "COMMIT_HASH", "\"$commitHash\"")
+    }
+
+    buildTypes {
+        release {
+            // TODO: Add your own signing config for the release build.
+            // Signing with the debug keys for now, so `flutter run --release` works.
+            signingConfig = signingConfigs.getByName("debug")
+        }
+    }
+}
+
+flutter {
+    source = "../.."
+}
+
+dependencies {
+    // Core library desugaring support library
+    coreLibraryDesugaring("com.android.tools:desugar_jdk_libs:2.1.4")
+}