This PR introduces a new `NonFungibleAdapter`.
It will be useful for enabling cross-chain Coretime region transfers, as
the existing `NonFungiblesAdapter` is unsuitable for this purpose. This
is due to the fact that there is only one class of items within the
`pallet-broker`, i.e., the Coretime regions.
---------
Co-authored-by: Francisco Aguirre <franciscoaguirreperez@gmail.com>
Co-authored-by: Dónal Murray <donalm@seadanda.dev>