feat(core): add include/exclude options to catalog.prompt()

[ericjypark]

PromptOptions doesn't currently expose a way to scope which components get documented in the generated prompt — the workaround in the issue is maintaining multiple sub-catalogs and swapping at the call site.

This adds include and exclude to PromptOptions. The filter applies to the streaming example, the AVAILABLE COMPONENTS list, and the componentNames passed to custom promptTemplates, so the resulting prompt stays internally consistent.

Changes

• include?: string[] and exclude?: string[] on PromptOptions
• include wins when both are set
• Unknown names log a console.warn and are ignored (no hard error)
• Catalog declaration order is preserved
• Custom promptTemplate receives the filtered componentNames
• No behavior change when neither option is set

Example

catalog.prompt({ include: ["Card", "Metric", "BarChart"] });

Only Card, Metric, and BarChart appear in the AVAILABLE COMPONENTS list and the streaming example.

Test plan

• pnpm vitest run packages/core/src/schema.test.ts (51/51, 8 new)
• pnpm test (930/930)
• pnpm lint

Fixes #271

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