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.

Commencez par l’issue #1117 et la PR #1371, qui fournissent le contexte existant des plug-ins OpenFX pour OpenColorIO. Déterminez comment le plug-in FileTransform doit s’intégrer aux travaux sur ColorSpaceTransform et DisplayViewTransform, notamment le toggle invert. La tâche est terminée lorsqu’un plug-in OpenFX FileTransform peut appliquer les formats LUT autonomes pris en charge, y compris CLF ; LookTransform et NamedTransform relèvent d’un périmètre de suivi distinct.

Rédigé par le modèle d'indexation à partir du texte de l'issue.