Page Template Type missing Footer

The general `Page` template type structure (https://github.com/adobe/aem-project-archetype/blob/develop/src/main/archetype/ui.content/src/main/content/jcr_root/conf/__appId__/settings/wcm/template-types/page/structure/.content.xml) has a Header and Body, but no Footer.

I can't think of a case where I've seen a web page w/o some sort of footer, at least a simple one. The default `Content Page` template created from the `page` template type does have a footer, as expected, but any other templates created from the `page` template type are missing a footer unless they add it. The default `page` template type should include a footer.

Open src/main/archetype/ui.content/src/main/content/jcr_root/conf/__appId__/settings/wcm/template-types/page/structure/.content.xml and inspect the existing Header and Body structure. Add the requested Footer structure so templates created from the page template type include it, then verify that the default Content Page behavior remains consistent.

Written by the indexing model from the issue text.