feat: rewrite the preset

[awwwdev]

This is a complete rewrite of the preset and many missing features are added.

Instead of adding all 12 shades of a color at the start, this adds color shades as they are used, unless they are safeListed. So always, the minimum amount of css is added to your project.

Mechanism:
There is a colorsInUse object that keeps track of colors used.
There is a unocss shortcut that runs when a radix color is used in a utility token, and add the color to colorsInUse.
In preflight, based on colorsInUse, it add css variables.

palette option is removed.

new options are introduced.

useP3Colors (boolean)
to use P3 colors with fallbacks

safeListColors:
a list of colors or color-shades to preserve

safeListAliases:
a list of aliases to preserve

onlyOneTheme ('dark' | 'light' | undefined):
if your app has only one theme, you can indicate with this, so only 'dark' or 'light' colors are added to css.

[endigma]

Hey, I'd be willing to review and accept this, but you'd need to update docs to reflect your changes and increment the major version in package.json. From an initial review, there's also a bunch of typescript errors that should be fixed before merge.

[awwwdev]

Sorry for late response. I'll address those. Thanks.