Support core API service registration

[aaronc]

Support service registration as specified by #14605 in the module.Manager on main. This involves checking for the cosmos.msg.v1.service annotation to determine whether a service is a query or msg service.

Note that this will require parsing proto annotations for services which requires merged the FileDescriptors from gogo and protoreflect. https://github.com/cosmos/gogoproto/pull/37/files introduces the function that we can use to get the merged file descriptors. Then we should convert these descriptors to an instance of protoreflect.Files and get the service descriptor. The service name itself should come from the ServiceDesc argument passed to ServiceRegistrar.RegisterService. Then we check for the cosmos.msg.v1.service annotation using proto.GetExtension on ServiceDescriptor.Options with cosmossdk.io/api/cosmos/msg/v1.E_Service.

[facundomedica]

@aaronc could you add more details on this? I can work on it but I don't know where to start. Thank you!

[aaronc]

I added some more details to the description. Let me know if that's clear enough or not @facundomedica

[tac0turtle]

@facundomedica is this closed?

[facundomedica]

Yes, for some reason merging the pr didn't close it.