Watchlist can now be fully enabled or disabled in the config.yml. When it's off, the /ah watch command disappears from help and tab-completion, and any watch-related tips get stripped from item lore automatically.
Button slots and materials for every menu are now defined in a new gui.yml file,
Titles, button labels, and lore templates have all moved into messages.yml
Replaced anvil interface with a ChatListener instead.
