Add capability to picture to be able to be sized with Width or Height and calculate the other dimension as a ratio to the original one #3

Currently, the WithSize method on DataSheetPicture need to specify Width and Height and the class doesn't expose the Width and Height to be able to calculate that outside.

It would be helpful to add the WithWidth and WithHeight or (Making the parameters optional in WithSize) and also exposing the Width and Height of the picture outside