Add docs on zeroshot image classification prompt templates (#31343)
* Add docs on pipeline templates
* Fix example and comments
Update usage tips
* Update docs/source/en/tasks/zero_shot_image_classification.md
Co-authored-by: amyeroberts <22614925+amyeroberts@users.noreply.github.com>
* Update docs/source/en/model_doc/siglip.md
Co-authored-by: amyeroberts <22614925+amyeroberts@users.noreply.github.com>
* Trigger CI
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Co-authored-by: amyeroberts <22614925+amyeroberts@users.noreply.github.com>