openUrl function
Opens the specified url in the system's default browser.
Supports Windows ('start') and macOS ('open').
Implementation
Future<void> openUrl(String url) async {
if (Platform.isWindows) {
await Process.run('start', [url], runInShell: true);
} else if (Platform.isMacOS) {
await Process.run('open', [url]);
} else {
print('🌐 Please open: $url');
}
}