Surfaces the Button visual props that AlertDialog.Action and
AlertDialog.Cancel now forward (post `c6f063dc`) so the demo isn't
lying about the component's API:
- Action: 6 chips (full ButtonVariant — primary CTA), 5 size chips.
Intent is NOT exposed as a separate chip because it inherits from
the dialog's own `intent` prop (already a Live control above).
- Cancel: 3 chips (ControlVariant — narrowed per
DEMO_AUTHORING_GUIDE §12.7), 5 size chips. Always neutral palette
regardless of dialog intent.
Live preview wires both bindings into the rendered Action/Cancel; API
tables list the new props with type, default, and the snippet shape
(`Snippet<[{ props; intent }]>` for Action's `child`).
Co-Authored-By: Claude Opus 4.7 (1M context) <noreply@anthropic.com>