Changes

Remove empty cauldron contents

Empty in most places was used as a wildcard, recipes normally just checked levels instead. Easier to just make nullable for wildcard and use water elsewhere
Fixes an error where cauldrons placed from vanilla show as empty

Fix cauldron item model

Remove strict requirement that a content type is read from a string

Buffer method is now generic, JSON has an option to read/write to object or element, and NBT is just manual now
Should mean buffer is more efficient

Fix model error for waypoint compass

Fix a few places not responding to the cauldron recipes config

Allows enhanced cauldron without cauldron recipes, has a few minor changes

Fix wrong prop for milk bucket recipe

Depends on cauldron supporting fluids

Add DynamicFinishedRecipe as I implement IFinishedRecipe a lot

Add a delay to potion brewing in cauldrons

Now takes a bit longer than the brewing stand, to make up for the cauldron being cheaper. Works using "unfermented potions", which slowly stir into a regular potion under heat.