docs: add standalone config-db search syntax concept page

[Copilot]

No dedicated documentation existed for the catalog search query language — it was only referenced in passing or buried inside the Resource Selectors reference.

Adds mission-control/docs/guide/config-db/concepts/search.mdx covering:

• Syntax — field=value grammar, AND/OR logic with |, parentheses grouping, bare-word name prefix shorthand
• Operators — all 7 comparison operators with types they support (string, int, json, datetime)
• Existence checks — labels.app / !labels.app pattern for labels, tags, and properties
• Date queries — absolute (2025-01-15T10:30:00Z) and relative (now-24h, now+1w) with supported duration units
• JSON field access — dot-notation into labels.*, tags.*, config.*
• Type prefix matching — type=pod resolving to Kubernetes::Pod
• Searchable fields — full reference tables for catalog items and config changes
• Related configs — related=<id>[,direction][,depth][,type] traversal syntax
• Examples — 6 practical annotated queries (unhealthy resources, date ranges, label/tag filtering, cost queries, relationship traversal)

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Project	Deployment	Actions	Updated (UTC)
docs	Ready	Preview	Apr 1, 2026 8:47am