Convert the docs Docusaurus config files to TypeScript to match the
modern Docusaurus scaffold and give editors correct per-file types:
- docusaurus.config.js -> .ts (typed Config / Preset options, ESM)
- sidebars.js -> .ts (typed SidebarsConfig)
- remark-design-system-links.js -> .ts (typed Transformer<Root>)
- babel.config.js: ESM export, @docusaurus/babel preset (3.x split)
- add docs/tsconfig.json extending @docusaurus/tsconfig (editor-only,
not used by docusaurus build)
- add @docusaurus/babel, @docusaurus/tsconfig, @types/mdast deps
Also adds "docs" to the root jsconfig.json excludes, since docs is a
standalone Docusaurus project that now owns its own config.
Co-authored-by: Claude Opus 4.7 (1M context) <noreply@anthropic.com>
Co-authored-by: Ben Irvin <ben.irvin@strapi.io>
Andrei L