Feat: Acid Cauldron

[kd8lvt]

Adds an Acid Cauldron block, and some neat features for it.
Specifically:

• Standing in a cauldron full of acid is generally accepted to be a poor idea.
• Acid-Erodeable blocks (Stone Bricks, etc.) can be right-clicked on the Acid Cauldron to bulk-erode an entire ItemStack at a time
• Copper should be ageable, but it wasn't working in dev for whatever reason. My best guess is the way I'm converting Item -> Block, because it's kind of cursed. There's absolutely a better way to go about it, I just couldn't find it.
• Blocks in the ModBlockTags.ACID_DESTRUCTIBLE tag are deleted when right-clicked on the Acid Cauldron