Integrate Asset Hub and Tests for Asset and NFT Scenarios

[shawntabrizi]

• [ ] DropIt should not be able to mint new Assets or Collections

• Asset Scenarios

  • [ ] Asset Hub should be able to mint a new fungible asset, and reserve transfer it to DropIt.
  • [ ] DropIt should be able to do a basic distribution, and users should be able to reclaim their distributed amount back on Asset Hub.

• NFT Scenarios

  • [ ] Asset Hub should be able to mint a new collection and set DropIt as a minter role.
  • [ ] DropIt should be able to mint new NFTs into the collection.
  • [ ] Users should be able to transfer their NFTs back to Asset Hub, which will be minted into the collection.