main shipped v1.0.0 with prebuilt Windows binaries but no docs on main
explaining what the .exe is or how to run it (#450) — the quickstart lived
only on dev. Bring docs/quickstart.md to main and add a Windows-prebuilt
pointer to the README's Get started section, so users on the default branch
find the steps. Docs-only.
Refs #450
Co-Authored-By: Claude Fable 5 <noreply@anthropic.com>