examples: Add common linux component tapif_io

That can be used with linux target on lwip to pass packets from lwip to
linux host networking stack, e.g. routing the trafic to internet.

examples/common_components/protocol_examples_tapif_io/include/tapio.h

@@ -0,0 +1,27 @@
+/*
+ * SPDX-FileCopyrightText: 2022-2023 Espressif Systems (Shanghai) CO LTD
+ *
+ * SPDX-License-Identifier: Apache-2.0
+ */
+#pragma once
+#include "esp_err.h"
+#include "esp_netif.h"
+
+/**
+ * @brief Creates tapio layer as a driver interface to esp-netif
+ *
+ * @warning Implemented as singleton, can use only one tapio in the system!
+ *
+ * @return pointer to the tapio driver handle
+ */
+void *tapio_create(void);
+
+/**
+ * @brief esp-netif driver I/O output path
+ *
+ * @param h Driver's handle
+ * @param buffer Data to output
+ * @param len Data size
+ * @return ESP_OK on success
+ */
+esp_err_t tapio_output(void *h, void *buffer, size_t len);