Immortal Villagers

Added

• Added option to convert Nitwits to Villagers without professions by interacting with a Book.
• Added option to convert Villagers without professions to Nitwits by interacting with a Stick renamed to the set config option. (Default: stupid)
• Added option to reset Villager Trades by crouching and interacting with Paper renamed to the set config option. (Default: reset)
• Added option to convert Witches into Villagers by giving them a Golden Apple or Enchanted Golden Apple while they're under the effects of Weakness.