some `color` primitives make the conversion fails

These are the
- `desaturate` method, fails with `Color does not have a method "desaturate" or FieldAccess requires a dictionary`
- `color.hsl` constructor, fails with `Identifier "color" not found`
- `color.hsv` constructor, fails with `Identifier "color" not found`
- `color.linear-rgb` constructor, fails with `Identifier "color" not found`
- `.mix` method, fails with `Color does not have a method "mix" or FieldAccess requires a dictionary`
- `oklab` constructor, fails with `Identifier "oklab" not found`
- `oklch` constructor, fails with `Identifier "oklch" not found`
- `rotate` method, fails with `Color does not have a method "rotate" or FieldAccess requires a dictionary`
- `saturate` method fails with `Color does not have a method "saturate" or FieldAccess requires a dictionary`

No source file or test is identified in the issue. Start by reproducing the listed color primitive conversions in typst-hs and trace their conversion errors. Done means desaturate, hsl, hsv, linear-rgb, mix, oklab, oklch, rotate, and saturate convert without the reported failures.

Written by the indexing model from the issue text.