Add Image feature extraction on Hub as a task

[merveenoyan]

This PR adds image feature extraction to Hub.
Icon looks like below 👇

[gary149]

ok

[osanseviero]

This would add a filter/tag that leads to 0 models on the Hub (see https://huggingface.co/models?other=image-feature-extraction&sort=trending). We should first:

• add the tag to the corresponding transformers and timm repos. Which models would have this tag?
• explore adding the pipeline to transformers

From a quick look, most models in https://huggingface.co/models?pipeline_tag=feature-extraction&other=vision are candidates to be image-feature-extraction. These models are usually automatically tagged, so step 3 in https://www.notion.so/huggingface2/How-do-pipelines-get-determined-on-the-Hub-2fdc2f3ae1a44690b43e28adbe326d11 needs to be done. This also needs to align with the transformers team first to see if there's a need for this pipeline/task cc @LysandreJik @amyeroberts

There is a very related discussion on huggingface/transformers#20830 (comment) about this, we should check if feature-extraction works for these

[merveenoyan]

@osanseviero I made a script to run over timm models so I will be autotagging them after this PR is merged, can do the same for transformers feature-extraction models that are for vision. There's a lot of backbones on Hub, they're not explored well among other modalities and I think this is detrimental to UX of people using Hub for vision, this is discussed in the issue linked to this PR. (this issue was mainly raised by Ross & Niels BTW so not sure Amy and Lysandre are in favor or aware in general)

[osanseviero]

can do the same for transformers feature-extraction models that are for vision

Please carefully review the resources/Notion linked above. We should not open PRs for the vision-tagged transformers models. The pipeline_tag in transformers models is automatically detected, so actually we need to add ImageFeatureExtractionPipeline there and update the mapping, which will automatically update the tags for transformers repos

[osanseviero]

Thanks!