Thingamajigs 1.8.1 Update!

This is the final update for 1.21.4!

Tested on internal dedicated server, and seems to be working.

Additions and Improvements:

• Inficart is back! (you can ride it now, start it up with green blocks above, or red blocks to stop below, or manually give it resins to boost it to your desired speed, and shift right click resin to slow it down again, by default, the cart uses fun physics introduced with experiments, have fun :D ;) )
• More statues (4 new statues with unique artistic styles)
• Snow Machine (shift-right click to toggle; it endlessly fires little snow pieces, with a satisfying poof)
• Ball Pit (old feature recreated, with fun plastic spheres flying about as you run through them, and sounds too)
• Resin Filled Block (uninteresting at day, but wait till nightfall)
• Animated Deer (2 modes changed with an axe or wrench, and antlers can be toggled with a Reindeer Head)
• 3 new plants that generate in various biomes (go explore to collect them all, and bring shears)
• Lots of little changes for various features that cannot be put into words here

Changes and Fixes:

• More future proofing and internal code changes, including removal of old classes that are not referenced at all