docs(getting-started): verify quick-start/validating-metadata/quick-reference

quick-start (Anatomy) verified claim-by-claim against the Zod sources
and the blank template — no changes needed.

validating-metadata:
- added a real-shaped clean-run output sample (step lines match
  validate.ts printStep calls verbatim);
- corrected gate-parity wording: compile/build shares the core
  validators, while os validate additionally runs list-view modes
  (ADR-0053), view-container shape, and JSX/React page-source checks
  (ADR-0080/0081);
- removed the monorepo-internal pnpm --filter instruction.

quick-reference (~45 corrections, each grep-verified in
packages/spec/src):
- removed rows for nonexistent compliance.zod.ts / masking.zod.ts and a
  duplicated Service Registry row; moved Dataset from Data to UI;
- expanded the AI table 3→11 rows (Skill, Tool, MCP, Embedding,
  Knowledge Source/Document, Usage, Solution Blueprint — the section
  advertised RAG/cost tracking with zero matching rows);
- added Environment (cloud) and Expression (shared) rows;
- fixed ~35 stale Key Schemas names to real exports (QueryOptions→
  QueryAST, PluginHook→PluginLifecycle, Auth→LoginRequest/Session,
  Channel→RealtimeEvent, Package→MarketplaceListing/PackageSubmission,
  all seven kernel plugin-* rows, …) and updated table counts.

Co-Authored-By: Claude Fable 5 <noreply@anthropic.com>
Claude-Session: https://claude.ai/code/session_012Kj2MJEPXoUXC4LiC3XYJc

Author: claude