Text with a highlight that sweeps across it, for pending states like "cloning" or "waiting for a runner". Ported from spelte.dev, but the js animation is gone (plain css keyframes now) and the colour comes from our semantic tokens instead of a tailwind palette. The highlight is mixed out of currentColor towards the page background, so it lightens in light mode and darkens in dark mode on its own. Nothing uses it yet. Signed-off-by: eti <eti@eti.tf>