Reworked entire theme engine

[cph101]

• Added support for more themes
• Used variables instead of having duplicate css (efficiency)
• Added 3rd theme for example’s sake

I’d be happy to incorporate the other open pull requests into this if any conflicts are found

[cph101]

I'll make another revision

See https://github.com/iamcal/enchant-order/issues/48#issuecomment-1729559234

[iamcal]

This is really great - thank you!

I'll re-work the languages PR myself - I was planning to change how it worked anyway

[cph101]

Thanks Cal! I wasn’t sure this was going to get merged since it’s not essential 😅