Cozy Core

A visitor at your door, on Paper too: some evenings, while someone is home, a stray cat, or a rabbit or fox where they live, walks up to the Hearth Lantern and rests by it, on a free cushion if there's one near, and leaves in the morning unless you name it, tame it or put it on a lead. New setting `hearthVisitors`, and `/cozycore visit` for operators.