Prepare Renderoni 0.9 beta

[elemarin]

Summary

• harden deterministic hashing, physics synchronization, lifecycle cleanup, and resource ownership
• make MCP actions, assertions, stepping, and JSON-RPC handling fail loudly
• add lazy dual-stick touch controls while restoring desktop pointer-lock behavior
• publish an honest 0.9 beta package contract with stable exports, packed-consumer tests, and beta-safe release workflow
• lazy-load Console OS games and rebuild Model Studio as a preview/annotation/screenshot tool
• replace the README and add beta support, security, changelog, device checklist, bundle budgets, and cross-platform CI gates

Release contract

• version: 0.9.0-beta.1
• MCP transport: stdio only
• networking: removed from the public beta surface
• exact state hashes: pinned Node 22 Linux x64 matrix
• other supported platforms: deterministic gameplay outcomes and run-to-run parity
• publishing remains a dry run; no npm release is performed by this PR

Validation

• npm run gate:beta
• 208 tests
• TypeScript typecheck
• deterministic golden-hash and lifecycle/leak gates
• MCP negative-path and 500-byte observation gates
• README examples compile
• packed Node and Vite consumer smoke tests
• package and Console OS production builds
• bundle/load budgets
• beta dist-tag release-contract dry run

Manual device checks remain documented in docs/beta-release-checklist.md.