This type will archive multiple files de-duplicated in a zip with a
central manifest that describes how to recreate the actual layout.
In addition, any other zip file will be expanded and deduplicated
so that we can further reduce the size of those zips/nupkgs.
All of these are placed in a zip with no-compression, essentially
using the zip as only a container. We then LZMA compress that
container to achieve maximum compression.
