The //docs package currently defaults to public visibility, however, the targets within it are just for rules_python to generate its own docs. Other projects shouldn't be relying on the details of how we generate our documentation (especially as I'd like us to move to a generated doc solution like Sphinx so we can have Real Documentation).

From what I can tell, the docs targets are only public so that other projects are able to get the necessary bzl sources for the rules_python bzl code (e.g. //python:defs.bzl) (usually for their own documentation generation), and various filegroups and bzl_libraries were defined in //docs to avoid a dependency on skylib.

We depend on skylib profusely now, so we don't need to worry about that concern.

But, the bzl_library targets in //docs were public targets for a long time, and a Slack thread indicates a couple projects might be pointing to them, so I don't want to just yank them out. I'll put some aliases to make it a bit easier to handle an upgrade.