Add JEI ghost ingredient handling for filters and crafting slots Fixing #213

[GaeaKat]

Description

This pull request introduces support for JEI ghost ingredients in filters and crafting slots. It includes:

• New classes: JEIFilterGhostIngredients and JEICraftingTerminalGhostIngredients to handle ghost ingredient features.
• Implementation of PacketFilterSlot for server-side updates of filter slots.
• Update to FilterSlot with a public slotClick method to facilitate packet communication.
• Registration of JEI ghost ingredient handlers in the JEIPrettyPipesPlugin.

[Ellpeck]

Hm, it turns out I was a bit too quick to merge these without testing they work. This may be in relation to #250 not having been merged with, but this PR and the non-JEI one (#252) have a number of issues:

• adding ghost items to a crafting terminal's crafting slots does not add them "properly", causing the Request button to still be unavailable. This occurs both with this and Add non JEI item dragging for the Crafting Terminal #252's implementation. For some reason, this doesn't happen consistently either? I can't really figure out the pattern right now though.
• For Add non JEI item dragging for the Crafting Terminal #252, ghost items can only be dragged into the first eight slots. The ninth slot is ignored. This does not occur with the JEI handling.

Sorry that I so hastily merged these without checking if it all works, I'd assumed these were thoroughly tested because you shared all the videos & screenshots in the Discord server. Again, maybe this is just because #250 has not been merged yet.