Feature Request: Base24 support

[LovingMelody]

The underlying base16 library now supports the tinted-theming spec aka base24. Would be nice to see this included to add more colors to themes. With base24 being compatible with base16 this could be done in slow stages.

[KiaraGrouwstra]

when this lands here, the base24 github org offers implementations for a couple of applications we might use here then

[Lord-Valen]

Since https://github.com/tinted-theming/base24/blob/master/styling.md#base24-fallbacks is a thing, and base16-nix always generates a base24 compatible value according to that fallback rule, we should be able to just start doing this. In other words: It appears as though we already have the base24 schemes, we just aren't using them.

[danth]

Yep, I don't see any reason not to start implementing this on a module-by-module basis.

[trueNAHO]

It appears as though we already have the base24 schemes, we just aren't using them.

Yep, I don't see any reason not to start implementing this on a module-by-module basis.

Agreed. Until VIM highlight groups are implemented, supporting base24 schemes seems reasonable:

The solution I'm considering mimics vim's highlight groups

VIM's highlight groups might be the most scalable and practical solution I know of.

It would resolve nearly all our open issues regarding color scheme scalability. Additionally, our documentation could simply link to VIM's highlight groups documentation.

-- #249 (comment)

Note that implementing VIM highlight groups is a non-trivial task. Supporting base24 yields faster and easier results.