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this series tries to 1. render options with role. so the options can be cross referenced and defined. 2. move the formatting out of the content. so the representation can be defined in a more flexible way. Closes scylladb/scylladb#15860 * github.com:scylladb/scylladb: docs: add divider using CSS docs: extract _clean_description as a filter docs: render option with role docs: parse source files right into rst