docs: clicking outside search results should hide hits

[blan19]

☕️ Reasoning

Currently, a search hits view is persisting when clicking outside Doc Search component.

I've modified it so that when clicking outside the Doc Search component, the view is no longer returned while still maintaining the query.

{isSearchHitsVisible && (
  <NoResultsBoundary>
    <Hits
        hitComponent={Hit}
        className="fixed left-2 top-28 z-50 mt-[50px] max-h-[calc(100dvh_-_120px)] w-[calc(100vw_-_16px)] overflow-y-auto rounded-md bg-neutral-100 shadow-lg md:absolute md:left-auto md:right-0 md:top-12 md:mt-auto md:w-96 dark:bg-neutral-800 [&>ol]:flex [&>ol]:flex-col [&>ol]:divide-y [&>ol]:divide-neutral-400/30 [&>ol]:dark:divide-neutral-900/50"
      />
  </NoResultsBoundary>
)}

// search hits view is no longer returned
// but maintaining a query

🧢 Checklist

• Documentation
• Tests
• Ready to be merged

🎫 Affected issues

fixes #11893

📌 Resources

• Security guidelines
• Contributing guidelines
• Code of conduct
• Contributing to Open Source

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