AE2: EMI network-inventory & synthetic-fav backport

This is a tiny, pure backport of Applied Energistics 2‘s provideNetworkInventoryToEmi feature (AE2 PR #8215, by @ramidzkh), to v1.20.4, for NeoTech and similar modpacks from the era.

This enables EMI’s “synthetic favourites” / crafting-tree / registration and tracking of partially-complete in-progress crafts, when using AE2 terminals.

This only applies code already accepted upstream.

I’m using this in my own saves; but it’s primarily AI-written; use with a grain of salt. (I’m an experienced dev, and I did put in the effort to ensure this has a minimum of quality, though.)