Revert "docs - update basic exploration (#39559)" (#40067)

docs/exploration-and-organization/data-model-reference.md

docs/exploration-and-organization/exploration.md

docs/exploration-and-organization/images/browse-data.png

...exploration-and-organization/images/collection-detail.png

docs/exploration-and-organization/images/detail-view.png

...loration-and-organization/images/learn-about-our-data.png

...loration-and-organization/images/only-verified-models.png

docs/exploration-and-organization/images/search-results.png