Coq to Rocq name change #130
Description
Given the welcome name change of Coq to Rocq, we should add new homs. To preserve backwards compatability, the existing coq hom name should be retained, so we should just add a new synonym - either rocq or (to keep the three-letter-whenever-possible naming convention) roq. And similarly for the hom names that include coq as a substring. And the hom names like "ich" should have new synonyms like "ihr".
I don't think we should pervasively change instances of Coq inside the Ott source code (there are many, and I imagine that would be error-prone).
The tests that are used in the documentation (possibly all the simple tests) should be updated accordingly. Probably not the larger examples, though.