Implement "e-ink mode" for paginated swiping

[chocolatkey]

In this mode, when you swipe, instead of the page offset following your finger movements, the reader pops to the next/previous column

[mickael-menu]

This setting could also be useful beyond e-ink, for example accessibility (see prefers-reduced-motion CSS media feature). So we could use a more generic name, like transition=false.

[chocolatkey]

Yes, I have the same thing in my manga reader, an animations toggle that disables all page turn/move animations (in addition to ui animations). Even people without accessibility impairments like having this for e.g. lag purposes