docs(wiki): retarget dead links to existing docs; point at current repo
feat: add wiki scaffolding and Core Methods theory page - Home: audience entry points, method directory, resource links - _Sidebar: 3-level navigation (15 links) - _Footer: version policy, license, contribute info - Core-Methods: 13-step Scorecard derivation with worked example V-002 Phase 1 — Wiki as living textbook template