Incorporate Protocol fee within Uniswap v3 swap simulation.

[0xKitsune]

For Uniswap V3 Swap simulation, the protocol needs to be incorporated.

     // if the protocol fee is on, calculate how much is owed, decrement feeAmount, and increment protocolFee
            if (cache.feeProtocol > 0) {
                uint256 delta = step.feeAmount / cache.feeProtocol;
                step.feeAmount -= delta;
                state.protocolFee += uint128(delta);
            }