A dark-bg-ready variant of the mark: white face fill plus a die-cut white
contour so it reads on dark backgrounds, where logo.png (black on transparent)
and the social-preview face do not. Ships as SVG (scalable, white + black
layers) and a 1085x1241 PNG.
Contributed by @pixexid in #42.
Co-authored-by: pixexid <54691335+pixexid@users.noreply.github.com>
Co-authored-by: Claude Opus 4.8 (1M context) <noreply@anthropic.com>
