feat: Support Ekubo callback in TychoRouter

- add integration test
- cannot directly call _handleCallback from the locked method of the tycho router because of bytes memory to bytes callback conversion
- Rename to EkuboPoolKey because of conflict with USV4 pool key

- Bonus: fix bug where input token to swap method must be ERC20 (we should also support ETH)

foundry/lib/ekubo/interfaces/ICore.sol

@@ -2,12 +2,12 @@
 pragma solidity ^0.8.26;
 
 import {IFlashAccountant} from "./IFlashAccountant.sol";
-import {PoolKey} from "../types/poolKey.sol";
+import {EkuboPoolKey} from "../types/poolKey.sol";
 import {SqrtRatio} from "../types/sqrtRatio.sol";
 
 interface ICore is IFlashAccountant {
     function swap_611415377(
-        PoolKey memory poolKey,
+        EkuboPoolKey memory poolKey,
         int128 amount,
         bool isToken1,
         SqrtRatio sqrtRatioLimit,

foundry/lib/ekubo/types/poolKey.sol

@@ -5,7 +5,7 @@ pragma solidity ^0.8.26;
 type Config is bytes32;
 
 // Each pool has its own state associated with this key
-struct PoolKey {
+struct EkuboPoolKey {
     address token0;
     address token1;
     Config config;