Add the ability to randomize dimensions

[tusharbhutt]

I've messed around with Google Colabs to change the default resolution I put in to a random selection from a list based on a random number generator. So if the choices are between 1 and 12, if it rolls a 7, the dimension changes from the one used (say 512WX768H) and flips it. If it's an 11, it makes a pano (960Wx448H), and it it's a 1 then it becomes (832Wx512H) (examples only!)

Can this already be done in Automatic? Maybe a script can do this instead? Doesn't need to be in the GUI