docs: more S2 docs fixes (#9183)
* fix client listeners Element assumption
* improve Illustrations search (copy feedback + message)
* dynamic search placeholder if resources tag selected
* silently handle prefetch failures
* fix focus visible style so it doesnt linger on click
* fix anchor links
* don't clear search field when switching library tabs
* fix anchor links on page load
* better cards for releases
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Co-authored-by: Daniel Lu <dl1644@gmail.com>
