document how to run retrieval and generative eval using wds

[rom1504]

eg https://github.com/LAION-AI/CLIP_benchmark#coco-captions-example + https://huggingface.co/datasets/clip-benchmark/wds_mscoco_captions2017/tree/main

[rom1504]

maybe something like clip_benchmark eval --dataset=mscoco_captions --dataset_root="https://huggingface.co/datasets/clip-benchmark/wds_{dataset_cleaned}/tree/main" --task=mscoco_generative --model=coca_ViT-L-14 --output=result.json --batch_size=256 --pretrained=model.pt

[mehdidc]

Yes the following works fine for retrieval:

clip_benchmark eval --dataset=wds/mscoco_captions --dataset_root="https://huggingface.co/datasets/clip-benchmark/wds_{dataset_cleaned}/tree/main" --task=zeroshot_retrieval --model=ViT-B-32 --output=result.json

for generative something similar with task mscoco_generative does not seem to work, will fix it in a PR and add docs for both.

[mehdidc]

Done