Fix thinknode_m7 esp32s3 CI build failure from missing esp_eth_driver.h (#10585)

* Initial plan

* Add ESP32 ethernet header compatibility shim

---------

Co-authored-by: copilot-swe-agent[bot] <198982749+Copilot@users.noreply.github.com>

src/platform/esp32/esp_eth_driver.h

@@ -0,0 +1,7 @@
+#pragma once
+
+#if __has_include_next("esp_eth_driver.h")
+#include_next "esp_eth_driver.h"
+#elif __has_include("esp_eth.h")
+#include "esp_eth.h"
+#endif