WorldBench v0.1.0

Initial public MVP of WorldBench.\n\nHighlights:\n- CLI and Python SDK for robotics world-model evaluation\n- Synthetic demo dataset with good/bad model outputs\n- Control-aware metrics for action consistency, temporal stability, object permanence, and contact realism\n- Local zero-dependency HTML dashboard\n- Markdown reports and example benchmark artifacts\n- README demo GIF/video generator