Closes #1496 This brings back the SCE splash screens. Also adds a runtime flag `-nosplash` to skip it. Right now, it's on by default, but open to changes on that (maybe always disable in debug to speed up start times, etc.).
* temp * split up kprint, other than format * start kmachine * split kmachine * split kscheme * split klink * split klisten * split remaining * jak2 ckernel gets to nokernel loop