feat(esp_eth): add Ethernet sublayer with optional VLAN and switch

Introduce the experimental Ethernet sublayer (parent/child VLAN, optional
switch path, iodriver provider), restructure eth test apps, and document
the new APIs.

docs/en/api-reference/network/esp_eth.rst

@@ -577,7 +577,7 @@ The following functions should only be invoked after the Ethernet driver has bee
 
         * :cpp:member:`eth_mac_ptp_config_t::roll_type`: Rollover mode (digital or binary) for subseconds register. The binary rollover mode is recommended as it provides a more precise time synchronization.
 
-    Time stamps for transmitted and received frames can be accessed via the last argument of the registered :cpp:member:`esp_eth_config_t::stack_input_info` function for the receive path, and via the ``ctrl`` argument of the :cpp:func:`esp_eth_transmit_ctrl_vargs` function for the transmit path. However, a more user-friendly approach to retrieve time stamp information in user space is by utilizing the L2 TAP :ref:`Extended Buffer <esp_netif_l2tap_ext_buff>` mechanism.
+    Time stamps for transmitted and received frames can be accessed via the last argument of the registered :cpp:member:`esp_eth_config_t::stack_input_info` function for the receive path, and via the ``ctrl`` argument of the :cpp:func:`esp_eth_transmit_ctrl_bufs` function for the transmit path. However, a more user-friendly approach to retrieve time stamp information in user space is by utilizing the L2 TAP :ref:`Extended Buffer <esp_netif_l2tap_ext_buff>` mechanism.
 
     You have an option to schedule event at precise point in time by registering callback function and configuring a target time when the event is supposed to be fired. Note that the callback function is then called from ISR context so it should be as brief as possible.
 

docs/en/contribute/esp-idf-tests-with-pytest.rst

@@ -715,7 +715,7 @@ Mark Flaky Tests
 
 Certain test cases are based on Ethernet or Wi-Fi. However, the test may be flaky due to networking issues. Thus, it is possible to mark a particular test case as flaky.
 
-This code example is taken from :idf_file:`pytest_esp_eth.py <components/esp_eth/test_apps/pytest_esp_eth.py>`.
+This code example is taken from :idf_file:`pytest_esp_eth.py <components/esp_eth/test_apps/test_app_driver/pytest_esp_eth.py>`.
 
 .. code-block:: python
 

docs/zh_CN/api-reference/network/esp_eth.rst

@@ -577,7 +577,7 @@ ESP-IDF 在宏 :c:macro:`ETH_DEFAULT_CONFIG` 中为安装驱动程序提供了
 
         * :cpp:member:`eth_mac_ptp_config_t::roll_type`：亚秒寄存器的翻转模式（数字或二进制）。推荐使用二进制翻转模式，因为它能提供更精确的时间同步。
 
-    接收帧的时间戳可以通过注册的 :cpp:member:`esp_eth_config_t::stack_input_info` 函数的最后一个参数进行访问，传输帧的时间戳可以通过注册的 :cpp:func:`esp_eth_transmit_ctrl_vargs` 函数的 ``ctrl`` 参数进行访问。然而，对于用户获取时间戳信息，更简便的方式是利用 L2 TAP :ref:`扩展缓冲区 <esp_netif_l2tap_ext_buff>` 机制。
+    接收帧的时间戳可以通过注册的 :cpp:member:`esp_eth_config_t::stack_input_info` 函数的最后一个参数进行访问，传输帧的时间戳可以通过 :cpp:func:`esp_eth_transmit_ctrl_bufs` 函数的 ``ctrl`` 参数进行访问。然而，对于用户获取时间戳信息，更简便的方式是利用 L2 TAP :ref:`扩展缓冲区 <esp_netif_l2tap_ext_buff>` 机制。
 
     您可以通过注册回调函数和设置事件触发的目标时间，在精确的时间点调度事件。请注意，回调函数将在中断服务程序 (ISR) 上下文中调用，因此应尽量简洁。
 

docs/zh_CN/contribute/esp-idf-tests-with-pytest.rst

@@ -715,7 +715,7 @@ Pytest 使用技巧
 
 某些测试用例基于以太网或 Wi-Fi。然而由于网络问题，测试可能会不稳定。此时，可以将某个测试用例标记为不稳定的测试用例。
 
-以下代码示例来自 :idf_file:`pytest_esp_eth.py <components/esp_eth/test_apps/pytest_esp_eth.py>`。
+以下代码示例来自 :idf_file:`pytest_esp_eth.py <components/esp_eth/test_apps/test_app_driver/pytest_esp_eth.py>`。
 
 .. code-block:: python