Initialize complete 16-page BerryWiki structure
docs(wiki): replace the placeholder Home with a real wiki Five pages plus a sidebar: Home (orientation + index), Architecture (the compiler pipeline and the single-serializer invariant), Getting Started (verified commands and just recipes), Verification (what is proven vs tested vs ungated), Ecosystem (the six repos and the two contract corrections found by measurement). The wiki links to the measured in-repo documents rather than restating them, so it cannot drift out of sync with the repository. Co-Authored-By: Claude Opus 5 <noreply@anthropic.com>