launchWebsite method
=================== Web Sitesi ===================
Implementation
Future<bool> launchWebsite() async {
if (this == null || this!.isEmpty) return false;
var url = this!.trim();
if (!url.startsWith(RegExp(r'https?://'))) {
url = 'https://$url';
}
return _safeLaunch(url, mode: LaunchMode.externalApplication);
}