Quick Flow was an umbrella for quick-spec + quick-dev. Quick Spec is
gone and the new preview was promoted to bmad-quick-dev, so the explainer
should be about quick-dev directly. Replaces quick-flow.md with the
original quick-dev-new-preview.md content (renamed), including the
diagram reference. zh-cn uses the original hand-written Chinese
translation. Also removes stale Quick Spec references from agents.md.
Co-Authored-By: Claude Opus 4.6 (1M context) <noreply@anthropic.com>
Alex Verkhovsky