WIP: Make crafting villagers require food to craft

Currently, villagers don't have any requirements about their working conditions. This PR requires the player to be more fair to villagers under their employ by making villagers refuse to work in they haven't eaten food in the last 6,000 ticks (24,000 ticks == one in-game day). There's also code requiring villagers to have slept in the past 24,000 ticks to be able to work, but it is currently commented out. Villagers will make angry sound effects when they are out of food and try to craft something, so the player can tell that food is needed.