Create managed files for pulp-docs on ALL components

[pedro-psb]

Because there isn't an integrated system for distributing doc-related changes, modifying something in the docs infrastructure is painful and error-prone, which makes the development of pulp-docs brittle.

Generally we could use https://github.com/pulp/pulp_template for managing all plugin templates, but that doesn't apply to components (pulp-docs components) which are not plugins, for example, pulp-docs itself, pulp-cli, pulp-oci-images, etc. Probably we could extend it to all components, and non-plugins would opt-in only for docs. This is my prefered implementation approach.

I've started creating a re-usable github workflow for managing the component's docs CI, but it's not enough.
Some features that this would enable (and are important for future development) are:

• Checks and auto-fixes of compliance with new infrastructure change (e.g, folder names, a new docs config, formatting, etc)
• Managing a docs command runner (make docs-build/serve, ...) for canonical ways of build, serving and linting plugin-specific documentation.

[pedro-psb]

Draft plan:

1. (Re-)add the docs-section to the plugin-template system
2. (optional) refactor the plugin_template schema/structure to group plugin-template scopes (github, ci, docs). Doc-only component using it don't need to have all other settings in place if they don't use it
3. Add the plugin-template config and auto-update hook to every component under docs umbrella