Preconfigured Rule implementations

The rule name is an opaque string, but by convention they are maven-esqe artifact identifiers that follow a GitHub org/repo/rule_name convention.

Rule
stackb:rules_proto:grpc_cc_library
stackb:rules_proto:grpc_closure_js_library
stackb:rules_proto:grpc_java_library
stackb:rules_proto:grpc_nodejs_library
stackb:rules_proto:grpc_web_js_library
stackb:rules_proto:grpc_py_library
stackb:rules_proto:proto_cc_library
stackb:rules_proto:proto_closure_js_library
stackb:rules_proto:proto_compile
stackb:rules_proto:proto_compiled_sources
stackb:rules_proto:proto_descriptor_set
stackb:rules_proto:proto_go_library
stackb:rules_proto:proto_java_library
stackb:rules_proto:proto_nodejs_library
stackb:rules_proto:proto_py_library
bazelbuild:rules_scala:scala_proto_library