Restructure the SEARCH cheat sheet

[mauvo]

Summary

• replace the long mixed SEARCH example list with a concise overview
• add focused SEARCH VECTOR examples for syntax, scoring, post-filtering, and in-index filtering
• add focused SEARCH FULLTEXT examples for query syntax, scoring, pagination, and analyzer selection
• link to the detailed SEARCH reference for restrictions and advanced behavior

Syntax highlighting

The new SEARCH syntax exposes missing keywords and token-boundary handling in the currently published Cypher highlighter. highlightjs-cypher#21 fixes the highlighting. This documentation PR keeps the examples as ordinary source, cypher blocks and does not add a markup workaround.

Testing

• npm run build:preview
• previewed the aggregate cheat sheet with a local docs UI bundle built against highlightjs-cypher#21
• verified SEARCH, VECTOR, FULLTEXT, SCORE, ANALYZER, OFFSET, and [WHERE ...] highlighting in the rendered DOM

[neo4j-docops-agent]

This PR includes documentation updates
View the updated docs at https://neo4j-docs-cypher-1682.surge.sh

New pages:

• SEARCH FULLTEXT
• SEARCH VECTOR

Updated pages:

• Cypher Cheat Sheet
• SEARCH