message: docs: add danger section
diff: @@ -74,6 +74,15 @@ This use 3 kinds of variables:
  'var(--secondary-color-contrast)',
  ]}
  />
  + <ColorItem
  + title="Danger"
  + subtitle="Danger color, used for example in errors"
  + colors={[
  + 'var(--danger-color)',
  + 'var(--danger-color-lighten)',
  + 'var(--danger-color-contrast)',
  + ]}
  + />
  <ColorItem
  title="Disabled"
  subtitle="Used just in disabled states"
  