Prop 177: Add CANTO Metadata to Gravity Bridge

This proposal connects the Canto token to the Gravity Bridge. If accepted, it would establish metadata for the IBC denom ibc/64BBBEB97DA04B6CF7A29A5454E43E101B29F506C117E800E128E0B32BA3FE3D. This metadata would then be usable to deploy an ERC20 representation on Ethereum for the CANTO token. Voters should verify that the ibc hash is on channel-88, that this channel matches the forwarding proposal submitted in the past, and that the denom trace is for the correct token. This can be done using gravity query ibc-transfer denom-trace ibc/64BBBEB97DA04B6CF7A29A5454E43E101B29F506C117E800E128E0B32BA3FE3D. For more about Canto see https://canto.io/