Refactoring Balances Module

[aurexav]

currently,

Kton depends on Balances to access the TransferFee(Ring)

and

dust account detection strategy: #101

---

unify/remove Subtrait

• Ring
  • deps
    • Balances-Prelude
• Kton
  • deps
    • Balances-Prelude

[aurexav]

Can't make into trait

trait PositiveImbalance: Drop + From<Self::Balance> + Imbalance<Self::Balance> {}
trait NegativeImbalance: Drop + From<Self::Balance> + Imbalance<Self::Balance> {}

type TransferPayment: OnUnbalanced<
	dyn NegativeImbalance<
		Self::Balance,
		Opposite = dyn PositiveImbalance<
			Self::Balance,
			Opposite = dyn NegativeImbalance<
				Self::Balance,
				Opposite = dyn PositiveImbalance<
					// ...
					// circular dependency
				>
			>
		>
	>
>;