Implement W5500 support

include/W5500.h

@@ -0,0 +1,19 @@
+#pragma once
+
+#include <esp_netif.h>
+
+#include <Arduino.h>
+
+class W5500 {
+public:
+    explicit W5500(int8_t pin_mosi, int8_t pin_miso, int8_t pin_sclk, int8_t pin_cs, int8_t pin_int, int8_t pin_rst);
+    W5500(const W5500&) = delete;
+    W5500 &operator=(const W5500&) = delete;
+    ~W5500();
+
+    String macAddress();
+
+private:
+    esp_eth_handle_t eth_handle;
+    esp_netif_t *eth_netif;
+};