pub fn register_fonts(cx: &App) -> Result<()>Expand description
Register the bundled fonts through fonts::add. Failure is non-fatal:
the theme’s system fallbacks take over (same families the CSS stack names).
With no geist-* feature on, it registers nothing and returns Ok.
Your own fonts go through fonts::add too, and
theme::Theme::font_sans / theme::Theme::font_mono name which
family the components then paint with.