2.1-mc1.21.9

Ported to 1.21.9.
Significantly cleaned up and improved the performance of the mod's code overall.
Copper Pipes and Copper Fittings now use separate block classes for their waxed and unwaxed variants, like vanilla Copper blocks.
The method in which Copper Pipes detect whether can can dispense items has been updated.
- An item can be dispensed as long as a block's shape is completely supporting the pipe's back side and is not blocking the exit of the pipe at all.
- This makes blocks such as Trapdoors now viable to use alongside Copper Pipes!
The Hoe can no longer rotate Copper Pipes.
- This functionality can instead be accessed with the Wrench item from the mod The Copperier Age!