feat: UniswapV3Executor and integration tests

- Note: I think we can get the fee straight from the pool... why did we always encode this and send it from the solver? Is this bound to change sometimes?

foundry/test/Constants.sol

@@ -32,6 +32,9 @@ contract Constants is Test {
     address WETH_WBTC_POOL = 0xBb2b8038a1640196FbE3e38816F3e67Cba72D940;
     address USDC_WBTC_POOL = 0x004375Dff511095CC5A197A54140a24eFEF3A416;
 
+    // uniswap v3
+    address DAI_WETH_USV3 = 0xC2e9F25Be6257c210d7Adf0D4Cd6E3E881ba25f8;
+
     /**
      * @dev Deploys a dummy contract with non-empty bytecode
      */