A money type for Ash that uses the ex_money library.

When constructing a composite type, use a tuple in the following structure:

composite_type(%{currency: "USD", amount: Decimal.new("0")}}, AshMoney.Types.Money)

If you've added a custom type, like :money:

composite_type(%{currency: "USD", amount: Decimal.new("0")}}, :money)