✨ Feature: Rich Search Information

[JoshuaKGoldberg]

Bug Report Checklist

• [X] I have searched for related issues and found none that matched my issue.
• [X] This is the appropriate issue form for the bug I would like to report.

Expected

Google and other search engines allow for including rich search information with a page. Let's add that!

Actual

I've done nothing intentional to implement this so far.

Additional Info

https://docusaurus.io/docs/next/seo#rich-search-information