Add support for SUI

[lumtis]

Motivation

The SUI blockchain is rapidly gaining recognition in the ecosystem. https://sui.io/
Move is considered as a serious alt- EVM contender with its resource-oriented paradigm https://blog.sui.io/move-origins-sam-blackshear/

Solution

SUI seems to support recovering messages signed with ECDSA signature scheme: https://www.mystenlabs.com/blog/cryptography-in-sui-cross-chain-signature-verification
The solution can roughly be similar to Solana and TON when TSS congregate to sign a message with EVM private key, the message is nested in a SUI transaction and recover in a gateway contract.

Fungible Asset Support

SUI fungible assets uses a SUI::Coin type. All fungible assets, including the SUI gas token uses this object type. Therefore supporting any fungible asset might be trivial once SUI token integration is completed.
https://docs.sui.io/standards/coin

Calling SUI Contract

No research done yet on this part.