Add default toolchains registration code to scala_proto_library documentation.
Closes #768
Motivation
For a simple usage of scala_proto_library without customization, it seems default toolchains registration must be done, otherwise users will get error like: ERROR: No matching toolchains found for types @io_bazel_rules_scala//scala_proto:toolchain_type.
Description
Add default toolchains registration code to
scala_proto_librarydocumentation.Closes #768
Motivation
For a simple usage of
scala_proto_librarywithout customization, it seems default toolchains registration must be done, otherwise users will get error like:ERROR: No matching toolchains found for types @io_bazel_rules_scala//scala_proto:toolchain_type.