[Feature Request] System Settings for Light / Dark

[jsundai]

Is your feature request related to a problem? Please describe.

The docs site changed to having system settings as default so if people are in dark mode, the docs site shows up in dark mode on their computer. I noticed with the learn site it doesn't have a system settings feature so when you go from

1. website [dark as only option] -> 2. docs [dark in system settings] -> 3. learn will show up in light mode

Describe the solution you'd like

Might need to add a system settings option and also add an option to set dark mode as default.

Additional context

Mostly writing down this as an issue so I don't forget about it. Should be a pretty simple fix.

[jsundai]

#452