Update to new geom defaults

[teunbrand]

Hi Thomas,

This PR is mostly a demonstration for showing how we could bridge the old static default aesthetics to the new dynamic aesthetics while preserving backward compatibility.

There is nothing broken that will require this PR, but you might consider including it in the next ggforce release.

[teunbrand]

Marking this as draft until tidyverse/ggplot2#6285 is resolved, which would require a few tweaks.

[teunbrand]

Should now work with the latest theme gimmicks

devtools::load_all("~/packages/test/ggforce/")
#> ℹ Loading ggforce
#> Loading required package: ggplot2

ggplot(mpg, aes(displ, hwy, group = drv)) +
  geom_point() +
  geom_mark_hull() +
  theme_gray(ink = "red") +
  theme(geom.mark.hull = element_geom(bordertype = 2))

^{Created on 2025-03-25 with reprex v2.1.1}