Convert the image to a different colorspace.

Wraps Image.to_colorspace/2. Covers two CDN-grammar features with one IR primitive:

• Monochrome — target: :bw produces a true 1-channel grayscale image (smaller bytes than Adjust{saturation: 0.0}). Used by imgix's monochrome=<hex> (the hex tint is not yet honoured — v0.1 produces plain B&W).

• Colorspace conversion — any other target. Used by imgix's cs=<space> and Cloudinary's cs_<space>. Common values include :srgb, :cmyk, :rgb, :lab, :hsv. See Image.Interpretation.known_interpretations/0 for the full list Image.to_colorspace/2 accepts.

Pipeline ordering

The Image.Plug.Pipeline.Normaliser slots Colorspace between Adjust (which expects RGB) and ReplaceColor (whose colour matching operates on the post-conversion bytes). When you don't use Adjust or ReplaceColor, the relative order doesn't matter.