Creating Dark Mode Option

[sreyaarc]

Having an option to switch to dark mode will make the docs look much more appealing.

[sreyaarc]

Can I work on this issue? Can you please assign this to me?

[LePichu]

I was working on changing the landing page and making the docs usable until I stopped again due to time constraints, I can look into this myself when I get back at working on the website, no ETA though :/

[LePichu]

Also this is suited for alephjs/alephjs.org repository, this is the core library/framework repository