[feature] native-backed erc20 token

[extraymond]

Info

description:
While we can register erc20 token solely from their contract ABI, it might be safer to issue token in native asset form, then wrapped those token as erc20 token using chain-extension, this should expose other asset semantics on substrate reserved locked.

required features:

• create asset-registry to register native token for anyone
• create chain-extension to call registration for any token
• provide solidity interface to use a constructor to register it's self as a erc20 token
• grant privilege to the token issuer for issuing/burning the token within the smart contract