Rewrite the README around the initial public-release user flow, add the logo asset, and refresh install/update documentation.
Remove internal planning, audit, design, and work-split documents from the public docs tree.
Update stale documentation references and workspace seed expectations to point at public docs.
Tested: env GOCACHE=/tmp/zero-go-cache go test ./internal/workspaceseed
Tested: git diff --check
Anandan