Algolia DocSearch Dark Mode

[fishcharlie]

🚀 Feature

There should be support for the dark mode for the Algolia DocSearch.

Have you read the Contributing Guidelines on issues?

Yes

Motivation

Almost everything in Docusaurus has support for dark mode, except for the Algolia DocSearch.

Pitch

There should be support for dark mode for the Algolia DocSearch.

[gxanshu]

how to toggle dark mode manually