[Feature Request] Support two column documents
Scientific papers are very often written with two columns per page. It would be nice if zathura could have a two-column mode.
The idea is that the view is width-adapted to half of the page and when you scroll down, if you hit the bottom of the left column you wrap to the top-right corner of the same page, and if you hit the bottom of the right column you go to the top-left corner of the next page.
It is already implemented in some PDF readers for e-readers or android because it is simply super useful for small screen, but it would be great to have this in zathura for small screens (or even for bigger screen, it prevent breaking your reading flow).