Working on a Rust implementation, and request for test vectors

[Jason A. Donenfeld]

Hey Sopium,

Sascha and I are all set up. Let me know if you'd like to get in on
the effort too. As well, if you'd like to have a NoiseIK-specific
library or something of that sort, I'd be happy to host that on the
same infra/organization all together. Let me know what you'd like to
do.

Regards,
Jason