Mapping evm cosmos address

[Drizzle210]

Description

Referenced commits from Oraichain Ethermint:

a07e218 – EIP155 seperator is optional

466a4d2 – update EIP712AllowedMsgs

9eb8441 – add ConstructUntypedEIP712Data

bf7d824 – add ComputeTypedDataHash

6fa6d0e - revert code

78b4666 - feat: use sha256 to make chain id valid for evm

549aed7 – feat: add evm cosmos mapping logic

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