feat: add curve executor with router tests

Took 36 minutes


Took 2 minutes

foundry/interfaces/ICurveRouter.sol

@@ -0,0 +1,32 @@
+// SPDX-License-Identifier: BUSL-1.1
+pragma solidity ^0.8.26;
+
+interface ICurveRouter {
+    function exchange(
+        address[11] memory route,
+        uint256[5][5] memory swapParams,
+        uint256 amountIn,
+        uint256 minAmountOut,
+        address[5] memory pools,
+        address receiver
+    ) external payable returns (uint256);
+
+    function get_dy(
+        address[] memory route,
+        uint256[] memory swapParams,
+        uint256 amountIn,
+        address[] memory pools
+    ) external view returns (uint256);
+
+    
+}
+
+ struct CurveRouterParams {
+        address[11] route;
+        uint256[5][5] swapParams;
+        uint256 amountIn;
+        uint256 minAmountOut;
+        address[5] pools;
+        address receiver;
+    }
+