feat(docs): add collection description tooltips to Docusaurus collections page

[xingzihai]

Summary

This PR implements the feature request from #1266 to add collection description tooltips to the Docusaurus collections page.

Changes Made

1. Created CollectionTableWithDescriptions component (docs/docusaurus/src/components/CollectionTable/index.tsx)

   • Interactive table with hover tooltips showing detailed descriptions
   • Click-to-expand functionality for viewing full details and key features
   • Follows existing Docusaurus component conventions

2. Created collectionDetails.ts data file (docs/docusaurus/src/data/collectionDetails.ts)

   • Contains detailed descriptions extracted from *.collection.md files
   • Includes short descriptions matching the original table
   • Lists key features for each collection

3. Modified collections.md (docs/getting-started/collections.md)

   • Replaced static Markdown table with interactive React component
   • Users can now access collection details without navigating to individual docs

Acceptance Criteria

• ✅ Collection descriptions are accessible from the overview page without navigating to individual collection docs
• ✅ Descriptions are derived from *.collection.md source files
• ✅ Implementation follows existing Docusaurus component conventions (similar to Icons pattern)

Testing

Users can:

1. Hover over any row to see a quick tooltip with the detailed description
2. Click on a row to expand and see:
   • Full detailed description
   • Key features list (top 5 items from the collection)

Screenshots

The new table provides:

• Visual maturity badges (Stable/Preview/Experimental) with color coding
• Expandable rows with detailed content
• User-friendly hint explaining the interaction

---

Implements #1266

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[WilliamBerryiii]

@xingzihai - can you sign the CLA so that we can move forward with this PR?