Made mod hpack public as unstable feature. Allows using only the parsing part of h2 on an existing http2 message.

[LucioFranco]

I mean would it just make sense to make it its own crate?

[thesw4rm]

Is hyperium fine with that kind of architectural change?

I can throw in examples of how to parse byte array into a http2 frame into all relevant docs.

I kept it as unstable feature for now in case there are any issues.