chore: Rename all SwapExecutor to Executor only for simplicity

--- don't change below this line ---
ENG-4033 Took 9 minutes

foundry/src/ExecutionDispatcher.sol

@@ -0,0 +1,102 @@
+// SPDX-License-Identifier: UNLICENSED
+pragma solidity ^0.8.28;
+
+import "@interfaces/IExecutor.sol";
+
+error ExecutionDispatcher__UnapprovedExecutor();
+error ExecutionDispatcher__NonContractExecutor();
+
+/**
+ * @title ExecutionDispatcher - Dispatch execution to external contracts
+ * @author PropellerHeads Devs
+ * @dev Provides the ability to delegate execution of swaps to external
+ *  contracts. This allows dynamically adding new supported protocols
+ *  without needing to upgrade any contracts. External contracts will
+ *  be called using delegatecall so they can share state with the main
+ *  contract if needed.
+ *
+ *  Note Executor contracts need to implement the IExecutor interface unless
+ *  an alternate selector is specified.
+ */
+contract ExecutionDispatcher {
+    mapping(address => bool) public executors;
+
+    event ExecutorSet(address indexed executor);
+    event ExecutorRemoved(address indexed executor);
+
+    /**
+     * @dev Adds or replaces an approved executor contract address if it is a
+     *  contract.
+     * @param target address of the executor contract
+     */
+    function _setExecutor(address target) internal {
+        if (target.code.length == 0) {
+            revert ExecutionDispatcher__NonContractExecutor();
+        }
+        executors[target] = true;
+        emit ExecutorSet(target);
+    }
+
+    /**
+     * @dev Removes an approved executor contract address
+     * @param target address of the executor contract
+     */
+    function _removeExecutor(address target) internal {
+        delete executors[target];
+        emit ExecutorRemoved(target);
+    }
+
+    /**
+     * @dev Calls an executor, assumes swap.protocolData contains
+     *  protocol-specific data required by the executor.
+     */
+    // slither-disable-next-line dead-code
+    function _callExecutor(uint256 amount, bytes calldata data)
+        internal
+        returns (uint256 calculatedAmount)
+    {
+        address executor;
+        bytes4 decodedSelector;
+        bytes memory protocolData;
+
+        (executor, decodedSelector, protocolData) =
+            _decodeExecutorAndSelector(data);
+
+        if (!executors[executor]) {
+            revert ExecutionDispatcher__UnapprovedExecutor();
+        }
+
+        bytes4 selector = decodedSelector == bytes4(0)
+            ? IExecutor.swap.selector
+            : decodedSelector;
+
+        // slither-disable-next-line low-level-calls
+        (bool success, bytes memory result) = executor.delegatecall(
+            abi.encodeWithSelector(selector, amount, protocolData)
+        );
+
+        if (!success) {
+            revert(
+                string(
+                    result.length > 0
+                        ? result
+                        : abi.encodePacked("Execution failed")
+                )
+            );
+        }
+
+        calculatedAmount = abi.decode(result, (uint256));
+    }
+
+    // slither-disable-next-line dead-code
+    function _decodeExecutorAndSelector(bytes calldata data)
+        internal
+        pure
+        returns (address executor, bytes4 selector, bytes memory protocolData)
+    {
+        require(data.length >= 24, "Invalid data length");
+        executor = address(uint160(bytes20(data[:20])));
+        selector = bytes4(data[20:24]);
+        protocolData = data[24:];
+    }
+}