Add MEMBERSHIP, the club's own 1980s VHS advert

cut.py --cut ad: a plummy announcer (one gpt-audio read per line, ad.sh)
sells St. Mordred's over the creepiest takes with yellow 80s supers, a
PLAY/STOP VCR read-out, two testimonials from the real lines and the small
print read at speed, until the game's umpire says "Quiet." and the jingle
dies. A VHS grade (chroma smear, scanlines, tape wobble) is the cut's own.
gen.py learns a voice command; one new silent Doris take.

Co-Authored-By: Claude Opus 5.5 <noreply@anthropic.com>

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