Videos: Add support for MPEG-5 Essential Video Coding (EVC)

[lastzero]

Since support for MPEG-5 Essential Video Coding has been added in FFmpeg 7, this format can now also be supported by PhotoPrism after installing FFmpeg 7, as shown in the following documentation:

• https://docs.photoprism.app/getting-started/advanced/transcoding/#software-transcoding

Related Issues:

• Videos: Upgrade FFmpeg from 6.1.1 to 7.x for faster transcoding #4181