Update the docs for Go bzlmod (and gazelle)

[udf2457]

Description

I have been struggling to get bazel to compile protobuf files for me into Go.

299 suggests that unlike certain others, you have bzlmod support, which is good.

However the example project referred to in the docs https://github.com/rules-proto-grpc/rules_proto_grpc/tree/master/examples/go/go_proto_compile is based around WORKSPACE and doesn't use gazelle either.

It would be nice if you could update the docs/example to provide a more current (i.e. bzlmod) and real-world (i.e. gazelle) example.

Thank you.

[aaliddell]

• For bzlmod support, that example you link already is running under bzlmod. The empty WORKSPACE file is required to mark the workspace boundary even under bzlmod. At present an alpha version is available in BCR: https://registry.bazel.build/modules/rules_proto_grpc_go
• For Gazelle: see #220. Short answer is Gazelle is not supported at present