Add support for Apple Log

[rkmolholm]

Request: Addition of Apple Log to the OpenColorIO ACES config. I suspect this also means the addition of a new "Input/Apple" family.

Reference implementation: A CTL-based Apple Log IDT was recently added to aces-dev at: https://github.com/ampas/aces-dev/tree/dev/transforms/ctl/idt/vendorSupplied/apple

Documentation: The official white paper, and example 1D LUT (.cube) are located here: https://developer.apple.com/download/all/?q=Apple%20log%20profile

[carolalynn]

Related issue for adding built-in transform support to the main OCIO library: https://github.com/AcademySoftwareFoundation/OpenColorIO/issues/1916

[JGoldstone]

I'll have a run at these.

[KelSolaar]

Closing this one as @JGoldstone PR was merged: #125