Propose KIP-153 Public Labeling Database

[in63119]

KIP-153 is a proposal for a unified system contract management process See this PR in markdown Closes https://github.com/klaytn/kips/issues/153

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[aidan-kwon]

Can this contract allow anonymous users to request adding a label with proof such as a transaction hash of the contract deployment by the request address? If it is allowed, then the registration process could be more easier.