Option to render text with skrifa+vello_cpu?

[torokati44]

I'm aware that ab_glyph can be replaced with crossfont already, and there's #16 too - but since egui has recently replaced ab_glyph with skrifa+vello_cpu (emilk/egui#7694), any project that uses both egui and sctk-adwaita will be forced to ship two independent font rasterization engines. This is techncically not a deal-breaker, but feels unnecessary.
See for example: ruffle-rs/ruffle#23274

[torokati44]

Some more references, just as an FYI:

• Cosmic Text for font rendering emilk/egui#3378 (Proof of concept for Cosmic Text rasterization emilk/egui#4845)
• [WIP] Render text with Parley emilk/egui#5784