Implement catch and throw for Noctua's light federation protocol

[kltm]

Implement the catch and throw portions of Noctua's light federation protocol (see: geneontology/noctua#403), a Galaxy-like way for applications to federate and pass data with zero knowledge of the caller.

The first use case would be able to catch from and throw back to a Noctua instance: geneontology/noctua#403

[kltm]

Given that most of the Galaxy code remains in place, this would be very easy to piggyback.