fix: Make all tests pass!

Delete TokenTransfer.sol
Make slither happy

Bugfixes:
- Executors
  - Ekubo:
    - Fix the POOL_DATA_OFFSET value and remove sender from callback data
    - Use SafeERC20
  - Maverick and Univ2: Use safeTransfer and not safeTransferFrom
  - Univ3: update expected data length
  - Univ4: update the selectors (the signature changed)
- Router:
  - For split swap we don't need to pass the tokenInReceiver, it should always be the router address
  - For single and sequential: change order of the parameters (to be before the permit2 specific objects)
- Encoders:
  - Update selector signatures
  - For split swap pass the transfer_from (we might not need to if the token in is ETH)

Took 2 hours 51 minutes

foundry/test/executors/EkuboExecutor.t.sol

@@ -45,6 +45,7 @@ contract EkuboExecutorTest is Constants, TestUtils {
         uint256 usdcBalanceBeforeExecutor = USDC.balanceOf(address(executor));
 
         bytes memory data = abi.encodePacked(
+            false, // transferFromNeeded (transfer user to core)
             true, // transferNeeded (transfer from executor to core)
             address(executor), // receiver
             NATIVE_TOKEN_ADDRESS, // tokenIn
@@ -82,6 +83,7 @@ contract EkuboExecutorTest is Constants, TestUtils {
         uint256 ethBalanceBeforeExecutor = address(executor).balance;
 
         bytes memory data = abi.encodePacked(
+            false, // transferFromNeeded (transfer user to core)
             true, // transferNeeded (transfer from executor to core)
             address(executor), // receiver
             USDC_ADDR, // tokenIn
@@ -140,6 +142,7 @@ contract EkuboExecutorTest is Constants, TestUtils {
     // Same test case as in swap_encoder::tests::ekubo::test_encode_swap_multi
     function testMultiHopSwap() public {
         bytes memory data = abi.encodePacked(
+            false, // transferFromNeeded (transfer user to core)
             true, // transferNeeded (transfer from executor to core)
             address(executor), // receiver
             NATIVE_TOKEN_ADDRESS, // tokenIn

foundry/test/executors/UniswapV2Executor.t.sol

@@ -1,10 +1,11 @@
 // SPDX-License-Identifier: BUSL-1.1
 pragma solidity ^0.8.26;
 
+import "../TestUtils.sol";
 import "@src/executors/UniswapV2Executor.sol";
-import {Test} from "../../lib/forge-std/src/Test.sol";
 import {Constants} from "../Constants.sol";
 import {Permit2TestHelper} from "../Permit2TestHelper.sol";
+import {Test} from "../../lib/forge-std/src/Test.sol";
 
 contract UniswapV2ExecutorExposed is UniswapV2Executor {
     constructor(
@@ -51,7 +52,7 @@ contract FakeUniswapV2Pool {
     }
 }
 
-contract UniswapV2ExecutorTest is Test, Constants, Permit2TestHelper {
+contract UniswapV2ExecutorTest is Constants, Permit2TestHelper, TestUtils {
     using SafeERC20 for IERC20;
 
     UniswapV2ExecutorExposed uniswapV2Exposed;
@@ -193,7 +194,7 @@ contract UniswapV2ExecutorTest is Test, Constants, Permit2TestHelper {
 
     function testSwapIntegration() public {
         bytes memory protocolData =
-            hex"c02aaa39b223fe8d0a0e5c4f27ead9083c756cc2a478c2975ab1ea89e8196811f51a7b7ade33eb111d96f2f6bef1202e4ce1ff6dad0c2cb002861d3e0001";
+            loadCallDataFromFile("test_encode_uniswap_v2");
         uint256 amountIn = 10 ** 18;
         uint256 amountOut = 1847751195973566072891;
         deal(WETH_ADDR, address(uniswapV2Exposed), amountIn);

foundry/test/executors/UniswapV3Executor.t.sol

@@ -149,11 +149,7 @@ contract UniswapV3ExecutorTest is Test, Constants, Permit2TestHelper {
 
         vm.startPrank(DAI_WETH_USV3);
         bytes memory protocolData = abi.encodePacked(
-            WETH_ADDR,
-            DAI_ADDR,
-            poolFee,
-            TokenTransfer.TransferType.TRANSFER_TO_PROTOCOL,
-            address(uniswapV3Exposed)
+            WETH_ADDR, DAI_ADDR, poolFee, false, true, address(uniswapV3Exposed)
         );
         uint256 dataOffset = 3; // some offset
         uint256 dataLength = protocolData.length;

foundry/test/executors/UniswapV4Utils.sol

@@ -28,6 +28,7 @@ library UniswapV4Utils {
             tokenIn,
             tokenOut,
             zeroForOne,
+            transferFromNeeded,
             transferNeeded,
             receiver,
             encodedPools