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/lwip/tapif.h

@@ -0,0 +1,25 @@
+/*
+ * SPDX-FileCopyrightText: 2001-2003 Swedish Institute of Computer Science
+ *
+ * SPDX-License-Identifier: BSD-3-Clause
+ *
+ * SPDX-FileContributor: 2022-2023 Espressif Systems (Shanghai) CO LTD
+ */
+#pragma once
+#include "lwip/esp_netif_net_stack.h"
+
+/**
+ * @brief lwip netif init API
+ * @param netif pointer to lwip's netif
+ * @return ERR_OK on success
+ */
+err_t lwip_tapif_init(struct netif *netif);
+
+/**
+ * @brief Input data path
+ * @param h pointer to network stack handle (stuct netif* in our case)
+ * @param buffer Data
+ * @param len Data size
+ * @param l2_buff Data L2 buffer
+ */
+void lwip_tapif_input(void *h, void *buffer, size_t len, void *l2_buff);