Port to 1.20.1

[unilock]

Known issues:

• [x] Barn Doors drop an extra door
• [x] Barn Wood blocks need their own WoodType
• [x] Datagen needs to be redone (see here)
• [ ] Heads + Skulls show up in both "Functional Blocks" and Butchercraft CreativeModeTabs
  • (previously they would only show up in the "Decorations" tab, which has been removed from the game; vanilla Heads and Skulls are now in the "Functional Blocks" tab)