feat: Support Curve ETH

Curve pools use a different address from ETH (native token)

- Pass Chain into the SwapEncoderBuilder and SwapEncoder
- Add native_token_curve_address and native_token_address to CurveSwapEncoder
- Added integration test for this curve case

--- don't change below this line ---
ENG-4306 Took 1 hour 4 minutes


Took 11 seconds

foundry/test/TychoRouterTestSetup.sol

@@ -98,7 +98,7 @@ contract TychoRouterTestSetup is Test, Constants {
             new UniswapV3Executor(factoryPancakeV3, initCodePancakeV3);
         balancerv2Executor = new BalancerV2Executor();
         ekuboExecutor = new EkuboExecutor(ekuboCore);
-        curveExecutor = new CurveExecutor(ETH_ADDR);
+        curveExecutor = new CurveExecutor(ETH_ADDR_FOR_CURVE);
 
         address[] memory executors = new address[](7);
         executors[0] = address(usv2Executor);