Option to compress externally and just store input compressed byte stream.

[anatawa12]

In my project, my tool compress extremely huge files.
So I want to compress files in parallel.

Therefore, I want rs-async-zip to have option to accept compressed binary stream or byte slice and just construct zip file with the compressed stream and I want to compress in parallel in other thread.

It's out of my use case but it might also be helpful to have similar option for reading for parallel decompress.