docs migration - Standard Library

Source: documentation/standard-library/index.md
Proposed disposition: Needs determination — this page provides a brief overview and links to Apple Developer documentation and stdlib design content (via _preview-package.md and _stdlib-design.md includes). The standard library content is being updated to be generated as its own separate catalog, and when that's available, redirect this content to that hosted location.
Reviewer: @swiftlang/language-steering-group

Note: The _preview-package.md and _stdlib-design.md include files are incorporated into this page and should be handled as part of the same decision.

Checklist

• Create a GitHub issue to track this migration once destination is confirmed (if migrating)
• Determine disposition and choose explicit destination
• Decide how to handle _preview-package.md and _stdlib-design.md include content
• If migrating: translate Jekyll markdown to DocC markdown format
  • Remove YAML front matter
  • Inline content from include files or create separate articles
  • Convert any Jekyll callouts to DocC-style callouts
  • Verify links to Apple Developer documentation and Swift Package Index are current
• If migrating: add article(s) to target catalog's Documentation.md
• Run swift package generate-documentation --analyze --warnings-as-errors in the target package
• Preview locally with swift package --disable-sandbox preview-documentation
• Submit PR for appropriate team review
• After merge and publication: add redirect_to: in the swift.org source file's front matter
• Submit redirect PR to swift-org-website

Start by reading documentation/standard-library/index.md together with the _preview-package.md and _stdlib-design.md includes, then determine the explicit destination with the language steering group. If migration is approved, follow the listed DocC conversion steps, add the articles to the target catalog's Documentation.md, and run the specified generation and preview commands. Done means the destination and include handling are decided, the catalog is published, and the source page has a redirect_to entry.