Add ML-KEM KATs

[marsella]

Closes #148

This adds a few easy-to-run tests for ML-KEM that will hopefully make it easier to be confident about all the upcoming changes in the ML-KEM gold standard issues. They are not fast and I only added one for each parameter set, although there are many more in the sourced repo.

In addition to the work listed in the linked issue, this also renames all the modules around here to adhere better to our standards.

[sauclovian-g]

I would strongly recommend doing just the git rename ops as one commit, and putting all the content changes in a second separate one, even though that probably means the first commit won't be buildable. Otherwise you're at the mercy of git's rename detection heuristics. (Note that if you look at the first commit here, it mostly comes up as deletes and entirely new files; that's because the rename detection heuristics don't work very well. 😐 This means for example that you won't be able to cross the rename with git log or git blame.)

At this point that'll be kind of a pain to retcon in though and maybe it's not really worthwhile...

[marsella]

I would strongly recommend doing just the git rename ops as one commit, and putting all the content changes in a second separate one, even though that probably means the first commit won't be buildable. Otherwise you're at the mercy of git's rename detection heuristics. (Note that if you look at the first commit here, it mostly comes up as deletes and entirely new files; that's because the rename detection heuristics don't work very well. 😐 This means for example that you won't be able to cross the rename with git log or git blame.)

At this point that'll be kind of a pain to retcon in though and maybe it's not really worthwhile...

It didn't take that long to fix, so now the individual commit diffs look good. The overall diff still fails to recognize the rename, but hopefully this will help anyone pawing through the history.

[sauclovian-g]

It will. I just checked and git log --follow works, and it probably didn't before. Also should anyone be merging/rebasing they can now merge stepwise over the renames if they need to, which can avoid all kinds of weird problems.

Thanks :-)