refactor NetworkDevice interface to work with new esp mqtt lib

networkDevices/espMqttClientEthernet.h

@@ -0,0 +1,20 @@
+#pragma once
+
+#include "MqttClientSetup.h"
+#include "ClientSyncEthernet.h"
+
+class espMqttClientEthernet : public MqttClientSetup<espMqttClientEthernet> {
+public:
+#if defined(ARDUINO_ARCH_ESP32)
+    explicit espMqttClientEthernet(uint8_t priority = 1, uint8_t core = 1);
+#else
+    espMqttClient();
+#endif
+
+protected:
+#if defined(ARDUINO_ARCH_ESP8266) || defined(ARDUINO_ARCH_ESP32)
+    espMqttClientInternals::ClientSyncEthernet _client;
+#elif defined(__linux__)
+    espMqttClientInternals::ClientPosix _client;
+#endif
+};