Add field "filter" to /is-valid endpoint
Currently, in moon-landing, we use the "search" field to enable the search and the filter. But on https://huggingface.co/datasets/Andyrasika/ShoeSandalBootimages/viewer/default/train?p=1, for example, the search is disabled because we have no text columns, while the filter works (see https://datasets-server.huggingface.co/filter?dataset=Andyrasika/ShoeSandalBootimages&config=default&split=train&where=label=1&length=1).

See the related internal issue: https://github.com/huggingface/moon-landing/issues/8590
Add field "filter" to /is-valid endpoint: Currently, in moon-landing, we use the "search" field to enable the search and the filter. But on https://huggingface.co/datasets/Andyrasika/ShoeSandalBootimages/viewer/default/train?p=1, for example, the search is disabled because we have no text columns, while the filter works (see https://datasets-server.huggingface.co/filter?dataset=Andyrasika/ShoeSandalBootimages&config=default&split=train&where=label=1&length=1).

See the related internal issue: https://github.com/huggingface/moon-landing/issues/8590