Function load_supervised_image_folder_dataset_with_classes 

pub fn load_supervised_image_folder_dataset_with_classes<P: AsRef<Path>>(
    root: P,
    config: &SupervisedImageFolderConfig,
) -> Result<SupervisedImageFolderLoadResult, ModelError>

Loads supervised training samples from an image-folder classification tree and returns class mapping.

Class names are returned in deterministic lexicographic directory order and correspond to class indices used in targets.