This implements a grpc service for requesting data from pprof.
You can think of this like net/http/pprof but for grpc.
Additionally includes an HTTP proxy for setting up an HTTP endpoint similar to
the ones provided by net/http/pprof but proxies to the GRPC service.
You can point go tool pprof at t this proxy and it should all just work.
See cmd/ for examples on how to use these and to just generally test it.