Feature Request: "Use system setting" option to toggle dark mode according to OS preference

[quasimik]

First off, thanks to contributors for this awesome repo! The dark mode is great, but I often toggle my system preferences and would love to see more usage of the prefers-color-scheme media query in websites.

For an example of UI implementation, this is how Notion does it:

More info:

https://stackoverflow.com/questions/50840168/how-to-detect-if-the-os-is-in-dark-mode-in-browsers