Simple Copper Pipes

- 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](https://modrinth.com/mod/the-copperier-age)**_!