Made spawners craftable, made interacting with spawners using a filled soul gem set the entity in the spawner.

Still not quite sure what to call the “filled” soul gem. One idea i had was to call it just a soul gem and call the not filled one an “Empty Soul Gem”, which is honestly a pretty good idea, but I’m not sure what to do when it’s in the process of being filled. Technically at that point it’s not empty, but maybe it’d be fine to call it that