rename method

Implementation

@override
Future<SafDocumentFile> rename(String uri, bool isDir, String newName) async {
  final map = await methodChannel.invokeMapMethod<String, dynamic>('rename', {
    'uri': uri,
    'isDir': isDir,
    'newName': newName,
  });
  if (map == null) {
    throw Exception('Failed to rename: $uri');
  }
  return SafDocumentFile.fromMap(map);
}