Add new <search> element to docs

[YummyBacon5]

MDN URL

https://developer.mozilla.org/en-US/docs/Web/HTML/Element/search

What specific section or headline is this issue about?

No response

What information was incorrect, unhelpful, or incomplete?

There's now a new <search> element in the HTML spec, created about two weeks ago, which is not yet included in these docs.

What did you expect to see?

Documentation about the element

Do you have any supporting links, references, or citations?

• https://html.spec.whatwg.org/multipage/grouping-content.html#the-search-element
• whatwg/html@c598ff0

Do you have anything more you want to share?

This new element should also be mentioned on the <input type="search">, role="search" and role="searchbox" pages.

[teoli2003]

We wait for the first implementation between documenting.

A PR can be created before, but we'll wait before publishing the new article.

[bsmth]

For future when someone works on a PR to add this, Domenic has kindly offered to review:

related issues and pull requests:

• Add the <search> element whatwg/html#7320
• Document the <search> element mdn#385