Slow the pipes down and add detail and skeletons to the haunted house

[vaprdev]

• 3D Pipes: grow at a quarter of the previous speed, tuned with the owner. The cycle limit and warm-up scale with it, so each cycle still fills the same amount.
• Haunted house: more Victorian detail (gingerbread trim, iron cresting, round attic window, dormer and oriel, stone foundation, sagging gutters, vines, curtains, a portrait, a rocking chair) and skeletons at every activity level, plus a skeleton dog, click skulls and skeletons in the zombie dance. Bones are amber by day and teal at night, never white.

Images already on assets.

Verified: typecheck, build, dev/check.ts --quiet --max-ms=60 in octant and quadrant modes (126 runs each, 0 failed), --verify-dirty haunted-house pipes, screenshot check (42 up to date), README images match assets.