The method fit_into_columns does not really fit into this crate. Fitting into columns can be improved a whole lot if it is implemented as a separate data structure. Removing it allows us to clean up the API for the fit_into_widths use case.

However, we need to ensure that we don't break anyone's code! We don't use fit_into_columns in uutils, but eza does use it (https://github.com/search?q=repo%3Aeza-community%2Feza%20fit_into_columns&type=code).

I hope they can refactor that in some other way. I'll be contacting them about this.