chore: import upstream snapshot with attribution

examples/peripherals/uart/uart_select/pytest_uart_select.py

@@ -0,0 +1,13 @@
+# SPDX-FileCopyrightText: 2025 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
+
+
+@pytest.mark.generic
+@idf_parametrize('target', ['supported_targets'], indirect=['target'])
+def test_uart_select_example(dut: Dut) -> None:
+    dut.expect_exact('uart_select_example: Timeout has been reached and nothing has been received')
+    dut.write('a')
+    dut.expect_exact('uart_select_example: Received: a')