Combine separate
This pattern used to be pack-unpack. We made the actions more general, and changed the pattern to produce a package output, with both packed items and packing materials as input. This also will work for packaging and kitting during production.
Discussion here: #674 (closed). Leaving the issue open to consider ResourceSpecification containedIn relationship, and adding more explanation to the doc. This MR covers the base change so that the old pack-unpack is no longer in the doc.