Add results count to search mode

[allanlasser]

Fixes #934

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Lighthouse	1 paths audited Performance: 25 (🔴 down 34 from production) Accessibility: 86 (🟢 up 1 from production) Best Practices: 83 (🔴 down 9 from production) SEO: 82 (no change from production) PWA: - View the detailed breakdown and full score reports

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[github-actions]

Coverage Report

Status	Category	Percentage	Covered / Total
🔵	Lines	31.02%	6820 / 21983
🔵	Statements	31.02%	6820 / 21983
🔵	Functions	49.19%	276 / 561
🔵	Branches	75.47%	1037 / 1374

File Coverage

File	Stmts	Branches	Functions	Lines	Uncovered Lines
Changed Files
src/lib/components/viewer/Search.svelte	0%	0%	0%	0%	1-86

Generated in workflow #462 for commit 02ba438 by the Vitest Coverage Report Action