Add dark mode

[geekyahmed]

Is your feature request related to a problem? Please describe.
This is actually a great way to hell users have a much better experience using dark mode especially for people who don't like the exposure of light.

Describe the solution you'd like
Since it is based on Nexjsand react, a couple of components are out there that you can be able to integrate to make it seamless and easy to use.

Describe alternatives you've considered
None actually

[nicholaschiang]

Thanks @geekyahmed (PRs are always welcome too, if you want to have a stab at implementing this yourself)!

We'll have to change our config.$colors Sass variable (defined in src/styles/config.scss) to be global CSS variables that are toggled by the dark/light mode toggle @geekyahmed was referring to (this is what Vercel's website does right now).

We'll want to follow the Material Design spec for dark theming as well (e.g. the Vercel dark theme has too much contrast IMO).

[geekyahmed]

Sure I will