Convert unity hex coords to cube hex coords

UnityToCubeHex.cs

private Vector3Int UnityCellToCube(Vector3Int cell) 
{
    var yCell = cell.x; 
    var xCell = cell.y;
    var x = yCell - (xCell - (xCell & 1)) / 2;
    var z = xCell;
    var y = -x - z;
    return new Vector3Int(x, y, z);
}
private Vector3Int CubeToUnityCell(Vector3Int cube)
{
    var x = cube.x;
    var z = cube.z;
    var col = x + (z - (z & 1)) / 2;
    var row = z;

    return new Vector3Int(col, row,  0);
}