chore: import upstream snapshot with attribution

examples/system/rt_mqueue/pytest_rt_mqueue.py

@@ -0,0 +1,21 @@
+# SPDX-FileCopyrightText: 2024-2026 Espressif Systems (Shanghai) CO LTD
+# SPDX-License-Identifier: CC0-1.0
+import pytest
+from pytest_embedded import Dut
+from pytest_embedded_idf.utils import idf_parametrize
+
+
+@idf_parametrize(
+    'target,markers',
+    [
+        ('esp32', pytest.mark.generic),
+        ('esp32c3', pytest.mark.generic),
+        ('linux', pytest.mark.host_test),
+    ],
+    indirect=['target'],
+)
+def test_rt_mqueue_example(dut: Dut) -> None:
+    dut.expect_exact('sending: 0')
+    dut.expect_exact('received: 0')
+    dut.expect_exact('sending: 1')
+    dut.expect_exact('received: 1')