Add a switcher to enable Tailwind variables for colors palette instead of hardcoded oklch codes

[serhii-chernenko]

The current colors palette is based on Tailwind colors and its variables.

But when I press to see “CSS {}” output, it generates only oklch hardcoded colors.
It’d like to have a possibility to use Tailwind colors instead, like:

--color-base-100: var(--color-white);
--color-base-200: var(--color-stone-100);
--color-base-300: var(--color-stone-200);

But when I put it to the output, it seems broken: