grpc endpoint plugin system

[avelino]

ref: #659

@avelino go server can run webassembly file using something like https://github.com/wasmerio/wasmer-go.
but I'm in favor of https://github.com/hashicorp/go-plugin.

Why?

With go-plugin we can use the power of GRPC to provide an extension. here we have a docs about how to use without Go.

How do I think this feature?

Download plugin -> Start plugin as an internal process-> establish the RPC communication -> provide the new feature as a HTTP endpoint making a call to the plugin behind the scenes.

Originally posted by @felipeweb in #466 (reply in thread)