Package-level declarations

Finds the Snowstorm files a model's particle keyframes use.

The item-model sprites one particle effect needs on Java.

Writes one particle effect's sprites into the resource pack: its texture under textures/entity/fmm_particles (FMM's atlas generator registers it), one flat quad model per sprite and a tintable item definition for each.

A particle effect a model uses, with the files it came from.