feat(evmutil)!: implement MsgConvertCosmosCoinToERC20

[pirtleshell]

Description

• adds message server handler for MsgConvertCosmosCoinToERC20
• registers the message for codec
• includes CLI cmd
• intend follow-up prs for the following:
  • event emission
  • e2e test

kava tx evmutil convert-cosmos-coin-to-erc20 --help
converts asset native to Cosmos Co-chain to an ERC20 on the EVM Co-chain

Usage:
  kava tx evmutil convert-cosmos-coin-to-erc20 [receiver_0x_address] [amount] [flags]

Examples:
Convert 500 ATOM and send ERC20 to 0x03db6b11F47d074a532b9eb8a98aB7AdA5845087:
  kava tx evmutil convert-cosmos-coin-to-erc20 0x03db6b11F47d074a532b9eb8a98aB7AdA5845087 500000000ibc/27394FB092D2ECCD56123C74F36E4C1F926001CEADA9CA97EA622B25F41E5EB2 --from <key> --gas 2000000

Checked out some initial gas things:

• 1st convert with deploy used 1,100,009 gas
• 2nd convert (which just transfers sdk.Coin & mints ERC20) used 152,648 gas

Checklist

• Changelog has been updated as necessary.

[galxy25]

😃 big fan of explicitness as a pillar of reliable distributed systems design (read: all web and blockchain software)