color-d 0.2.0 – type-safe color math (Oklab/OKLCH, gamut mapping, linear alpha) for D

[alex-1974]

Hi all,

I've released color-d 0.2.0, a small, allocation-free 
color-mathematics library for D. It is @safe pure nothrow @nogc 
throughout and usable in CTFE.

The idea: the color space is part of the type, and every step is 
explicit. Encoded and linear sRGB are different types, 
conversions never clip silently, and there is no default gamut 
mapper.

```dlang
import color;

const display =
     SRgbd(0.82, 0.25, 0.12)
         .toLinear.toXyzD65.toOklab.toOklch
         .withLightness(0.70).withChroma(0.16)
         .gamutMapRayTraceToLinearSRgb
         .toSRgb;
```

What's in it: sRGB/linear/XYZ D65/Oklab/OKLCH, CIELAB and 
CIEDE2000, straight and premultiplied alpha with linear-light 
compositing, interpolation with hue-path control, CSS Color 4 
gamut mapping (Local MINDE, Ray Trace), WCAG 2 contrast, CVD 
simulation (Brettel, Viénot, Machado), and packed SRgb8/SRgba8 
with hex interop.

What it is not: no HSL/HSV, wide-gamut spaces or CSS parser yet, 
and no theme or palette policy. The API is pre-1.0 and may still 
change.

It targets DMD 2.112/2.113 and LDC 1.42/1.43 on Linux x86-64. 
Feedback on other platforms is very welcome.

Docs: [github pages](https://alex-1974.github.io/color-d/)
Repo: [github](https://github.com/alex-1974/color-d)
DUB:
> dependency "color-d" version="~>0.2.0"

Feedback, issues and use cases are welcome.