Layout primitive that wraps a content section with an optional animated heading (title + lead) in centered, accent-line, split-start/end, or section layouts plus optional footer and contained-width body — a section scaffold for other components, not standalone content

• src/components/registry/blocks/section-wrapper.tsx→components/registry/blocks/section-wrapper.tsx
• src/components/registry/blocks/section-heading.helpers.tsx→components/registry/blocks/section-heading.helpers.tsx
• src/components/registry/blocks/section-heading.parsers.ts→components/registry/blocks/section-heading.parsers.ts