Generate RSS feeds

[simonrjones]

Given a content type generate an RSS feed with X number of items.

Atom RSS format.

Note we need to use non-changing GUIDs for each content item, otherwise RSS feeds will mistakenly mark a page as not read when the GUID changes. This is why WordPress uses a non-changing GUID.

[simonrjones]

Strata Data has RSS support via league/commonmark, can leverage this to output RSS fees from frontend