⚛️ Create the canonical React and Vite site blueprint

[szmyty]

Closes #14

What changed

• adds the opt-in site-react-vite capability and a strict holon.react-vite-blueprint/v1 profile
• ships a generic, inventory-locked React/Vite rendered pack with exact Node, pnpm, React, Vite, TypeScript, Vitest, and quality-adapter versions
• provides accessible route, not-found, and render-error states; responsive Identity token seams; canonical metadata; Pages fallback; and deterministic static output
• consumes the existing neutral plan/render/verify/rollback boundary while keeping LaunchKit, Storybook, publishable-package behavior, Egolint policy, Identity truth, and Relay deployment separate
• adds a canonical clean-room manifest, contract validator, integration proof, documentation, ADR, system, architecture, roadmap, and CI coverage

Acceptance evidence

• clean materialization and verified Holon ownership
• repeat planning resolves entirely to no-ops
• frozen pnpm installation
• Biome, type-aware Oxlint, TypeScript, Vitest, and Vite production build
• dependency-cruiser covers 11 modules / 14 edges and rejects an injected circular import
• two complete build trees are byte-identical
• canonical metadata, local static references, byte-identical 404.html, and live Vite preview are verified
• all 35 Python tests and all 18 Repository Intelligence component tests pass

Follow-up boundary

Issue #15 may now compose the dedicated LaunchKit profile from this generic foundation. This PR does not begin that work.