add TokenReceiverMock contract for testing token reception

Author: cqlyj

test/no-fork/mocks/TokenReceiverMock.sol

@@ -0,0 +1,9 @@
+// SPDX-License-Identifier: MIT
+pragma solidity 0.8.26;
+
+/// @title TokenReceiverMock
+/// @author Luo Yingjie
+/// @notice This is a mock contract for receiving tokens.
+contract TokenReceiverMock {
+    receive() external payable {}
+}