Add dark mode

Feature request

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This issue is not a duplicate, I've searched the Issue Tracker
This issue is not a question, I'm aware that I can submit questions via Mastodon, Twitter, Email, Reddit or Matrix
This issue is a feature request, and not a bug report, content request, or anything other

What are you missing or what could be improved?

Add a dark mode.

What is the solution you'd like to see?

Visitors should be able to toggle between a light and a dark mode, using a switch in the header bar.
Material for MkDocs supports two color schemes: a light mode, which is just called default, and a dark mode, which is called slate. The user can toggle between those schemes, settings are defined via mkdocs.yml.

Do you have additional comments?

N/A