add an alias for temporal_torus_translation

[aammd]

reviewer comment:

Alternative names for these permutations are "caterpillar randomization" and "cyclic shift permutation". The latter is the much more common terminology applied to these cyclic permutations.

A pity, because "caterpillar randomization" is rather charming 🐛 🕙 🐛

The suggested fix is to simply add an alias (e.g. cyclic_shift()) to replace temporal_torus_translation()

[aammd]

Are we going to use an alias for this? I believe it was suggested to avoid breaking any existing code that used temporal_torus_translation() -- but it looks like we've just decided to change the name to cyclic_shift() everywhere. I think that's fine! I suggest we close this one.
speaking of which, are we going to rename the .R file cyclic_shift.R or keep the old name?