Update all old scripts

[Vequinox]

Look at the following scripts and see if any need updating as models might have changed from 1.16 to 1.19:

• [ ] Stonecutter recipe script
• [ ] Blockstate scripts
• [ ] Block/Slab/Wall model scripts
• [ ] Block/Slab/Wall registry scripts
• [ ] Item model script
• [ ] Lang script
• [ ] Loot table scripts
• [ ] Tag script

[GirafiStudios]

Moved to using proper snake_case for registry names. Means any script that references the block registry name, will need changing.