This suggestion is for adding fluid support to grist recipes (minestuck:grist_cost and minestuck:source_grist_cost)

The idea would be to allow the ingredient in both to be a fluid, and for sources to be able to include fluids (or have a fluid_sources entry). Or using different recipe types for them.

This is mainly for modpack creation where sometimes fluids are made from multiple fluids

The alchemy system is currently built upon the vanilla recipe system, which makes it difficult to expand it to non-item stuff.
We should be separating it from the recipe system into its own thing eventually, but it'll be a bit of work to get there.