Allow default values to use other values about valkyrie HOT 2 CLOSED

#{
  let theme-schema = t.dictionary(
    (
      primary: t.color(),
      secondary: t.color(optional: true),
      tertiary: t.color(optional: true),
    ),
    post-transform: (_, it) => {
      if it.secondary == none {
        it.secondary = theme.primary.rotate(120deg)
      }
      if it.tertiary == none {
        it.tertiary = theme.primary.rotate(240deg)
      }
      return it
    },
  )
}