Move the 14 hack-house scripts (bootstrap, lets-hack, host-room, smoke,
demo/film harnesses, connect/join, ensure-docker/vbox) into hh/scripts/
and fix their path resolution for the deeper location. Update cross-refs:
sbx.rs script consts, app.rs hints, CI, direnv .envrc, README, and docs.
Co-Authored-By: Claude Opus 4.6 <noreply@anthropic.com>