Adds per-feature README images (cornu-spline style), generated by a reproducible Playwright capture script (npm run capture → scripts/capture.mjs):
- bar — the control bar beneath a Fraunces specimen (hero)
- axes — weight x optical-size variation
- features — lining vs oldstyle figures + fractions
- colour — the Nabla colour font in two custom palettes
Images live in assets/ and are referenced via absolute raw URLs (so they render on GitHub and npm).