fix(lwip): Add pytest to lwip

components/lwip/test_apps/pytest_lwip.py

@@ -0,0 +1,11 @@
+# SPDX-FileCopyrightText: 2026 Espressif Systems (Shanghai) CO LTD
+# SPDX-License-Identifier: Apache-2.0
+import pytest
+from pytest_embedded import Dut
+from pytest_embedded_idf.utils import idf_parametrize
+
+
+@pytest.mark.generic
+@idf_parametrize('target', ['esp32'], indirect=['target'])
+def test_lwip(dut: Dut) -> None:
+    dut.expect_unity_test_output()