Write OpenFX plug-in for FileTransform

Issue #1117 requests OpenFX plug-ins for OCIO and Michael has PR #1371 in progress that is almost complete to implement a ColorSpaceTransform and DisplayViewTransform plug-in, which are the key ones. It would also be great to have a few more OpenFX plug-ins, for example for FileTransform. This would allow people to apply stand-alone LUTs in any of the formats OCIO supports, including the Academy/ASC Common LUT Format (CLF). The implementation should include an "invert" toggle button, similar to Michael's work.

It would also be great to have OpenFX plug-ins for LookTransform and NamedTransform, although these could also be in separate PRs.

Comienza con el issue #1117 y el PR #1371, que proporcionan el contexto existente de los plug-ins OpenFX para OpenColorIO. Determina cómo debería encajar el plug-in FileTransform junto con el trabajo de ColorSpaceTransform y DisplayViewTransform, incluido el interruptor invert. La tarea estará completa cuando un plug-in OpenFX de FileTransform pueda aplicar formatos LUT independientes compatibles, incluido CLF; LookTransform y NamedTransform quedan fuera de este alcance y se abordarán posteriormente.

Escrito por el modelo de indexación a partir del texto del issue.