Datapack Utils

Added xor-shift pRNG: useful for generating a random number based on x/z position.
Added function du:world/random_seeded, based on the new xor-shift. Uses and LCG to generate random numbers seeded from the current location
Ore generation is now seeded
The structure generator will restrict placement if it detects a vanilla structure
Fixed some issues with ore gen
Fixed some issues with structure gen
Fixed item stutter in certain cases
Fixed Coal Block not being accepted as fuel in custom smelting recipes