ICommandInvoker<T> for fast "Mediator" approaches in ASP.Net Core pages

[jeremydmiller]

Basically just skip the silly "look up the message type handler" step within CommandBus.

So the signature would be something like just InvokeAsync(T message, CancellationToken token) : Task. Maybe pair this with some kind of Minimal API helper. Would allow you to use Jasper middleware strategies w/o having to have a new Jasper.Http