Replace metropole-grelin with body.typ, merge styling into md.typ, drop glossary support, and clean unused theme tokens.
Co-authored-by: Cursor <cursoragent@cursor.com>
Refine TOC and cover styling, add numbered headings and gray body text, unify #f6f7f8 surfaces, and replace sample content with a Markdown usage manual.
Co-authored-by: Cursor <cursoragent@cursor.com>