Add previously unobtainable enchanted books to woodland mansion chests

My reasoning for this:

- Right now, there is no real reason to go to a woodland mansion. The loot is generally underwhelming for the exploration necessary. There used to be totems unavailable anywhere else, but since raids exist they are renewable and fairly easy to get.

- In the endgame of a Minecraft world, once you max out your tools and armor, well, you hit a point where they can't be improved. Adding these would give woodland mansions more of a reason for existing.

The enchants would be sharpness/smite/boa 6, protection of all kinds 6, and possibly quick charge 4.