recommendation: rename _print to _latex

[drmowinckels]

I'd recommend renaming the _print functions to _latex. This will make it more clear that the functions create latex output.
Also, it creates a clear distinction from R print methods, that other developers and more advanced users might be familiar with, which is quite different.

as part of openjournals/joss-reviews#4740

[cosimameyer]

Thanks so much for this suggestion - that's excellent! I didn't think about it this way (we first envisioned the overview_print function to become a much broader function but it remained an overview_latex function as it is now and you are right - this name serves its purpose much better 😊). We discussed it internally and are very happy to go forward with your suggestion in PR #26