Feature: #79883 - Add cropVariant support to TypoScript rendering of images

See forge#79883


The introduction of the new crop variants forge#75880 broke the handling of cropped images when using TypoScript to render file(reference)'s. This feature fixes this and introduces a new TypoScript option to use a different cropVariant.

To use a different cropVariant as default you can provide the cropVariant name now in your TypoScript configuration. If cropVariant isn't provided the default variant will be used.

# Use specific cropVariant for the images
tt_content.image.20.1.file.cropVariant = mobile


If multiple cropVariants are available (see forge#75880) you can now configure which variant to use with the cropVariant option of imgResource.