feat(voyage): scaffold playground/ with DS vendor sync — v4.2 Step 5
- playground/voyage-playground.html: minimal skeleton (DOCTYPE, app-header, guide-panel, aria-live region, skip-to-main link). Steps 8-11 will extend with render-pipeline + creation gestures + sidebar + export.
- playground/vendor/playground-design-system/: synced via 'node scripts/sync-design-system.mjs voyage' (27 files + MANIFEST.json with source_commit + sync_date + SHA-256 per file).
- tests/playground/voyage-playground.test.mjs: 8 tests pinning HTML existence, DOCTYPE, no-external-URLs, no-marked, A11Y skip-to-main + aria-live, MANIFEST.json structure, vendored DS files present.
- shared/PLAYGROUND-MAINTENANCE.md: consumer list updated 5 -> 6 (added voyage).
Kjell Tore Guttormsen
2f4330265c