Wandering Trader backport

In the latest snapshot Wandering Traders were upgraded to have more trades, and buy things from the players. Today I felt like I had to post SOMETHING (Cos it's been a while). So here's a backport! Works perfectly fine for 1.21.4.

Below are all of the new possible trades in 1.21.5, I've altered the tall desert grass to instead trade normal tall grass, and wildflowers do not appear in the trades. If you want me to backport this further to a version of your choosing, just drop a comment below and I will try my best!