feat: add EVM destination chain support (Ethereum, Base, Arbitrum, OP, Avalanche, Polygon)

Generalize the relay step to support all CCTP V1 EVM chains alongside Solana. The destination chain is auto-detected from the CCTP message bytes, and users can also manually select from a dropdown. EVM relays use the injected wallet (MetaMask etc.) to call receiveMessage on the chains MessageTransmitter contract.

Made-with: Cursor

Author: jasbanza