Update learn section method guides for v0.3.0
- Rewrite wds-method-guide.md: 9 phases (0-8), correct agents (Saga/Freya/Idunn), updated install command, scenario-driven flow
- Create phase-3-ux-scenarios-guide.md: 8-question dialog, page outline dialog, Mermaid flowchart, quality gates, Phase 4 connection
- Rewrite phase-4-ux-design-guide.md: Freya as designer, scenario gate, outline-design loop, 9 activities, updated folder structure
- Replace phase-3-prd-platform-guide.md with redirect to new UX Scenarios guide
Co-Authored-By: Claude Opus 4.6 <noreply@anthropic.com>
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