Rook constructor
- {required bool isWhite}
 
Implementation
Rook({required super.isWhite}) {
  _value = 5;
  _img = super.isWhite
      ? "${userData.lightPieces}/torreB"
      : "${userData.darkPieces}/torreN";
  alreadyMoved = false;
}
Rook({required super.isWhite}) {
  _value = 5;
  _img = super.isWhite
      ? "${userData.lightPieces}/torreB"
      : "${userData.darkPieces}/torreN";
  alreadyMoved = false;
}