Feature request: integration of `geom_mark_*()` family with {marquee}

[teunbrand]

Hi Thomas,

I'm sure this would have crossed your mind at some point, but just to have it written down somewhere: it would be nice if the geom_mark_*() family of functions would work with {marquee} text. Aside from just the utility that comes with marquee text, it might also be feasible to simplify the layers, because the label/description distinction is embedded into the header/body distinction.