Add dark mode.

[nightowl286]

Dark mode is very much required, how are we meant to spread the word about this fabulous new approach of dynamic pages if half of the people looking at the site will go blind from it?!?

[jist99]

It's not just the site that requires dark mode, but the tables generated by sql-table.js are generated with a fixed style. So this might end up being a larger change than you might initially expect.

I think the real solution here would be to allow the user to easily set the style of the table, instead of it being done via javascript.