Ensure there are examples of all components in test data

[magicaljellybeans]

• [x] form_as_div with various widgets
• [x] action_link.html
• [x] back_link.html
• [x] breadcrumb_back.html
• [x] breadcrumb.html
• [x] breadcrumb_item.html
• [x] card_collection.html
• [x] card.html
• [x] care_card.html
• [x] contents_list.html
• [x] details.html
• [x] do_list.html
• [x] dont_list.html
• [x] expander_group.html
• [x] expander.html
• [x] favicons.html
• [x] footer.html
• [x] footer_link.html
• [x] header.html
• [x] hero.html
• [x] image.html
• [x] inset_text.html
• [x] pagination.html
• [x] review_date.html
• [x] skip_link.html
• [x] summary_list.html
• [x] warning_callout.html

[magicaljellybeans]

Also added header links for the form page and promo-hub.

[magicaljellybeans]

Added footer link.