Add cg-svg-hand-svg, a hand-row primitive that fans a list of card
specs with cursor, hint, and mark rings, reusing the existing card art.
Route cg-rummy--render-cards through it on a graphical display, with the
plain-text row kept as the terminal/batch fallback (cg-rummy-svg-cards).
This gives SVG faces to every game that shares that helper: Gin, Rummy,
Rummy 500, Hand & Foot, Go Fish, Old Maid, Cribbage, Scopa, Casino, and
Spite & Malice. Suite still 109/109; batch rendering uses the text path.