[page type] Add page-type for CSS recipes

[wbamberg]

This PR assigns page-type: "guide" values for CSS recipe pages.

Part of #15540.

I'm on the fence about these pages.

In #15540 I suggested making them a "css-recipe" type and there are reasons for that: they're clearly a specific kind of page, and they have a distinctive structure.

On the other hand, I think having as few types as possible is a good thing, and there are only a few of these pages, and tbh they don't seem to be an integral part of the reference docs. I think that it's OK to treat these as guide pages for now, and we can always invent a dedicated type in future if it seems worth doing (like, if we put a lot more work into them in future we might want to define/enforce a structure for them).

So in this PR I'm making them guide pages.

[github-actions]

Preview URLs (11 pages)

• /en-US/docs/Web/CSS/Layout_cookbook/Breadcrumb_Navigation
• /en-US/docs/Web/CSS/Layout_cookbook/Card
• /en-US/docs/Web/CSS/Layout_cookbook/Center_an_element
• /en-US/docs/Web/CSS/Layout_cookbook/Column_layouts
• /en-US/docs/Web/CSS/Layout_cookbook/Contribute_a_recipe/Cookbook_template
• /en-US/docs/Web/CSS/Layout_cookbook/Grid_wrapper
• /en-US/docs/Web/CSS/Layout_cookbook/List_group_with_badges
• /en-US/docs/Web/CSS/Layout_cookbook/Media_objects
• /en-US/docs/Web/CSS/Layout_cookbook/Pagination
• /en-US/docs/Web/CSS/Layout_cookbook/Split_Navigation
• /en-US/docs/Web/CSS/Layout_cookbook/Sticky_footers

Flaws (5)

Note! 9 documents with no flaws that don't need to be listed. 🎉

URL: /en-US/docs/Web/CSS/Layout_cookbook/Card
Title: Card
Flaw count: 4

• bad_bcd_links:
  • no explanation!
  • no explanation!
  • no explanation!
  • no explanation!

---

URL: /en-US/docs/Web/CSS/Layout_cookbook/Contribute_a_recipe/Cookbook_template
Title: Cookbook template
Flaw count: 1

• macros:
  • /en-US/docs/Web/CSS/example-property does not exist

[dipikabh]

👍 thank you!