Escrow contract with support for ERC20 tokens

[unknownunknown1]

PR-Codex overview

This PR introduces the EscrowToken contract for ERC20 token transactions with arbitration.

Detailed summary

• Added EscrowToken contract for ERC20 token transactions with arbitration.
• Implemented enums, structs, storage, events, modifiers, and governance functions.
• Included functions for creating transactions, updating parameters, and changing governors/arbitrators.

The following files were skipped due to too many changes: contracts/src/EscrowToken.sol, contracts/deployments/arbitrumSepoliaDevnet/EscrowToken.json

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