Port vault section (5 pages) and docs section (11 pages)
- content/vault/: _index.md, diff.md, session.md, status.md, tasks.md, wikilinks.md
- content/docs/: _index.md, introduction, tokens, reset, semantic-html,
components, data-attributes, navigation, layouts, charts, chroma, accordion-dialog
96 pages build clean (was 36). Docs use sidebar nav + TOC layout.
Vault uses sidebar with section fallback (no vault menu configured yet).
URLs fixed: playground refs → asw.trentuna.com.
Closes: asw#12, asw#9