Introduce a higher speed serializer option about wolverine

[jeremydmiller]

Honestly, this is going to be a documentation effort only. Not shipping anything right now.

[jeremydmiller]

I want to try to use MemoryPack here. Looks easy to use, perf numbers are off the charts. It'd need to be done in a separate extension Nuget to avoid taking the dependency.

Tasks

• Implementation of a MemoryPack version of Wolverine's IMessageSerializer
• An extension method on WolverineOptions to register that serializer globally
• Extension methods to add that serializer to listeners and/or subscribers?
• Test it end to end where it has to go over the wire. Could be just over TCP
• Add the new Nuget to the build.cs publishing

[jeremydmiller]

Done with the MemoryPack option!