Add more cracktros + an “Endless Cracktros” option

[limi]

This might be better done through @mrchrisster’s SAM project, but we should at least add a larger collection of cracktros, since they have a very particular style suited to cycling in the background.

Elkmoose on Twitter (from Scoopex) is pretty great at posting interesting cracktros, possibly use some of his as the starting point:
https://twitter.com/elkmoose/status/1773267341083619405

[limi]

Damn autocorrect 😄