Draw underlines and undercurls beneath glyphs and break around glyphs

[net]

Some modern rendering systems draw underlines underneath glyphs, and interrupt them to keep it from touching glyphs.

macOS:

Chromium:

This serves both an aesthetic and legibility purpose: it's easier to decipher glyphs when they're not colliding with or obscured by an underline.

This undercurl drawn by Ghostty is trying to indicate an error with the text _foo, but the undercurl obscures the _:

It would be great if Ghostty used the interrupted style of underlining for underlines and undercurls. ❤️

[lithammer]

Worth noting is that iTerm2 is doing this as well.