Add animation capabilities directly to Forma projects.\n\nScope:\n- Define the animation model and supported animated project assets.\n- Implement animation playback and lifecycle behavior in forma-oss.\n- Add a minimal working animated Forma project/example.\n- Document how Forma projects author, preview, and run animations.\n- Add validation and tests for animation configuration and playback.
Add animation capabilities directly to Forma projects.\n\nScope:\n- Define the animation model and supported animated project assets.\n- Implement animation playback and lifecycle behavior in forma-oss.\n- Add a minimal working animated Forma project/example.\n- Document how Forma projects author, preview, and run animations.\n- Add validation and tests for animation configuration and playback.