2026-08-07 — Antora docs component :: Agent Rules

Added Antora component under docs/ (overview / usage / architecture pages appear; page count grows from 0 → 3).
Removed personal-repo references from upstream public text (feature/docs-no-personal-refs merge).
Follow-on same week: math requirement (2026-08-11); README/changelog agent-rule expansion (2026-08-08).