Integrate Kivo Smart Wallet with EntryPoint (ERC-4337 Standard)

[devJaja]

Implement and integrate the EntryPoint contract per the ERC-4337 Account Abstraction standard to enable Kivo smart wallets to handle UserOperations instead of traditional EOA transactions.

The EntryPoint contract will serve as the core transaction router between the bundler, paymaster, and KivoSmartAccount — ensuring validation, execution, and gas payment logic are all standardized.