Experiment with testing installations and updates

[Wires77]

Installation part seems fine, but I'm not sold on SikuliX yet. It's a UI testing framework that tests based off of screenshots. Seems to work: https://github.com/Wires77/PathOfBuilding/actions/runs/10156509762/job/28085043979

I'm not sure that this is the path we want to go down though. Before merging this I'd want to take a look at invoking the update scripts directly somehow, using first.run or something similar.