0.7.1

Added

• Documentation page (docs/documentation.html): a single project-wide reference covering install,
  run, test, experiment, and how everything works — with first-class Windows (PowerShell/cmd)
  coverage using plain toolchain commands. Linked from the site nav (all pages) and the landing CTA.
• Automated releases (.github/workflows/release.yml): merging a release/X.Y.Z branch to main
  (which bumps CHANGELOG.md) creates the annotated tag and a GitHub Release with the changelog notes.

Changed

• Concise README: trimmed from ~300 to ~110 lines. Keeps the pitch, badges, 60-second quickstart,
  and the curriculum table (lesson + PDF links); the detailed ./run reference, provider table, RAG
  internals, and repository-layout tree now live on the Documentation page.