feat: add search.loading options for remote search

[Timeless0911]

Summary

• add search.loading options for remote search
• remove 1s of search index loading for local search

Related Issue

Checklist

• [ ] Tests updated (or not required).
• [ ] Documentation updated (or not required).

[Timeless0911]

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[netlify[bot]]

✅ Deploy Preview for aquamarine-blini-95325f ready!

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🔨 Latest commit	622f596dc8e16d0a7046d985c38ed737071b51cc
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Lighthouse	1 paths audited Performance: 90 (🔴 down 5 from production) Accessibility: 97 (no change from production) Best Practices: 92 (no change from production) SEO: 92 (no change from production) PWA: - View the detailed breakdown and full score reports

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[Timeless0911]

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[Timeless0911]

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