ICC-profile-driven colourspace conversion. Distinct from
Ops.Colorspace (which uses libvips' named-interpretation
modes); this op invokes Image.to_colorspace/3 and runs an
actual profile-based transform.
Used to map provider parameters that target specific output
profiles — e.g. Cloudinary's cs_adobergb (when wired
against an Adobe RGB ICC file) and any custom-ICC overlay.
:profile is one of :srgb / :cmyk / :p3 (libvips
built-ins) or a path to an .icc file. :intent is
forwarded to Image.to_colorspace/3 and defaults to
:relative.