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.

.github/workflows/README.md

@@ -0,0 +1,100 @@
+# CI/CD Workflows
+
+## Build Multi-Platform Workflow
+
+Automatically builds the MeshCore SAR app for Android, iOS, macOS, and Windows.
+
+### Triggers
+
+- **Push to main/develop**: Builds with version `1.0.0+1` (from pubspec.yaml)
+- **Pull requests to main**: Test builds only
+- **Version tags** (e.g., `v1.2.3`): Release builds with versioned artifacts
+- **Manual**: Via GitHub Actions UI
+
+### Creating a Release
+
+1. **Ensure your local version is 1.0.0**:
+   ```bash
+   # pubspec.yaml should show:
+   version: 1.0.0+1
+   ```
+
+2. **Commit all changes**:
+   ```bash
+   git add .
+   git commit -m "Prepare for release"
+   git push origin main
+   ```
+
+3. **Create and push a version tag**:
+   ```bash
+   git tag v1.2.3
+   git push origin v1.2.3
+   ```
+
+4. **GitHub Actions will**:
+   - Temporarily patch version to `1.2.3+<timestamp>` in builds only
+   - Build Android APK & App Bundle
+   - Build iOS app (unsigned - configure secrets for signed IPA)
+   - Build macOS DMG
+   - Build Windows executable (ZIP)
+   - Create a draft GitHub release with all artifacts
+
+5. **Publish the release**:
+   - Go to GitHub Releases
+   - Edit the draft release
+   - Add release notes
+   - Publish
+
+### Build Artifacts
+
+| Platform | Artifact | Location |
+|----------|----------|----------|
+| Android APK | `app-release.apk` | `artifacts/android-apk/` |
+| Android Bundle | `app-release.aab` | `artifacts/android-appbundle/` |
+| macOS | `MeshCore-SAR.dmg` | `artifacts/macos-dmg/` |
+| iOS | `Runner.app` | `artifacts/ios-build/` (unsigned) |
+| Windows | `MeshCore-SAR-Windows.zip` | `artifacts/windows-executable/` |
+
+### iOS Code Signing (Optional)
+
+To build signed IPA files, add these repository secrets:
+
+1. **IOS_P12_BASE64**: Base64-encoded .p12 certificate
+   ```bash
+   base64 -i Certificate.p12 | pbcopy
+   ```
+
+2. **IOS_P12_PASSWORD**: Password for the .p12 certificate
+
+3. **IOS_PROVISION_PROFILE_BASE64**: Base64-encoded provisioning profile
+   ```bash
+   base64 -i Profile.mobileprovision | pbcopy
+   ```
+
+Then uncomment the signing steps in the workflow.
+
+### Version Numbering
+
+- **Local**: Always keep `pubspec.yaml` at `version: 1.0.0+1`
+- **CI builds**: Uses `1.0.0+1` for regular commits
+- **Release builds**: Uses `<tag>+<timestamp>` (e.g., `1.2.3+1729512345`)
+- **No commits**: Version changes are temporary and never committed back
+
+### Troubleshooting
+
+**Build fails on macOS DMG creation**:
+- The workflow tries `create-dmg` first, then falls back to `hdiutil`
+- Check if app icon path exists at `macos/Runner/Assets.xcassets/AppIcon.appiconset/app_icon_512.png`
+
+**Windows build fails**:
+- Ensure Windows desktop is properly configured in project
+- Run locally: `flutter config --enable-windows-desktop && flutter build windows`
+
+**iOS build fails**:
+- Check CocoaPods version and dependencies
+- Review code signing configuration (currently set to `--no-codesign`)
+
+**Android build fails**:
+- Verify Java 17 is compatible with your Gradle version
+- Check `android/build.gradle` for minimum SDK requirements