It is desirable to use the PageImages extension as an alternative source for images that power the banners.
Expected source of image:
- If user specified a file name use that (even if red link)
- If user didn't specify a file name and Wikidata banner property is set fall back to Wikidata banner
- If user didn't specify a file name, and no wikidata banner/no wikidata banner property and PageImages set use PageImages
- PageImage support is configurable
- Image can come from PageImages when enabled
- It should be configurable to swap the order so that PageImages are preferred to Wikidata banners.
- PageImages support enabled on wikipedias