Librarian's Balance

Added features that should help guide new players. This helps with accessibility on large servers. Toggleable.

• Verbose Mode: When a Mending trade gets filtered out, send a message to guide the player into an End or Ancient City instead. Enabled by default and can be disabled in the settings. Useful for when the pack is enabled on a large server.
• When a villager has no initial book trade to swap a new one into, send a subtitle explaining why they can't accept the trade in addition to showing the angry particles.