Next steps on proto/grpc documentation

[ ] A gazelle -> proto_library section would be useful following from the discussion above, but I don't think I'm well placed to write it, as I generally don't have enough experience with Gazelle. So yeah, I'll leave that open to anyone that feels they know it well. "Toolchains, how to use a prebuilt protoc." This is semi covered in the issues section discussing caching
[ ] "Relevant bazel flags and explanations." There only seem to be a few documented proto relevant flags remaining nowadays, of which the only one I've still seen used is the experimental --experimental_proto_descriptor_sets_include_source_info when using documentation plugins.
[x] You probably want to fixup the index page for the GH pages site. Something like what the SIG is, who's sponsoring it, what it's funding etc.
[ ] "Relationship of FileDescriptorSet with proto_library and descriptor_set_in." This'd probably fit in a section on 'Implementing a Ruleset', which is a book all of its own.

bazel-contrib / SIG-rules-authors