WorldEdit copy/paste furniture assets should re-roll UUIDs to prevent linking behavior

When copying with worldedit (//copy -e) and passing (//paste -e), the pasted furniture is always linked to the copy furniture.

Attached is a video showing an interactive furniture, where actions performed on the pasted furniture only affect the copied furniture. The same applies to destruction: once glued, you can't destroy it; hitting it destroys the copied furniture.