Docs split into chapters: 21 new pages, sidebar and Home by chapter, moved links (drnachio/postext#894) Generated from develop with pnpm wiki: the pages split off Configuration, Programmatic Usage, Document Format, Sandbox and Architecture (#884), and Composed Pages with its settings. The hand-written pages (Features, Getting Started, Packages, Pagination and numbering) link the sections where they live now; every internal link resolves (55 pages, 0 broken).