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