TownTopia: Additions

New
- Stuck villager rescue: a villager that's been trying to walk for 2+ minutes without getting anywhere, or is stuck inside a block or off the walkable area, is sent back to the village bell. TownTopia already moves trapped villagers to a safe spot nearby; this covers the times it can't. Config: [stuck_rescue] enabled, minutes.
- /village mine fill <name> (admins): fills a regenerating mine completely with fresh stone and ore and saves it again, handy if you defined it after it was already part-mined.
- /village mine refill (admins): fills your village miner's tunnels back in right away.
- /village mine ores by_height | everywhere (admins): "everywhere" lets mine refills use every ore at any height, with diamond, gold, redstone and lapis kept rare. Made for sky islands and high villages where those ores never appear. Saved with the world.
- Two new buttons on the menu's Admin page for the mine commands.

Improved
- Automatic mines now close in tunnels that run out into open air (off a cliff or over the void): rock is added below, beside and above, so the miner always has a floor and walls. Config: [auto_mines] close_in_tunnels.
- Job finder wording: "1 Teacher", "3 Children" instead of "1 Teachers", "3 Childs".