Migrate RSS publishing to the new documentation system

Documentation location/URL

https://www.drupal.org/node/2426139 →

Problem/Motivation

The RSS Publishing page is only in the old documentation system. It is under the Contrib modules for building the site functionality section.

Proposed resolution

Since Views is in Drupal Core, I suggest this page get migrated to the Creating Listings with Views chapter → of the User Guide. The page would be called Adding an RSS Feed Display to a View

Remaining tasks

1. Agree on a place to migrate the content
2. Create the new documentation page
3. Update the content of the documentation page to be accurate and relevant to Drupal 8/9