Added IoT Kernel (#2431)

IoT Kernel is a simple class / library for quickly adding basic IoT functions to a project. Functions include, among other, Wifi, MQTT and Configuration via web UI

Author: maximemoreillon

repositories.txt

@@ -5551,3 +5551,4 @@ https://github.com/sparkfun/SparkFun_WM8960_Arduino_Library
 https://github.com/Beirdo/Arduino-FRAM-Cache
 https://github.com/mission-mangal/speed-control
 https://github.com/mission-mangal/PositionControl
+https://github.com/maximemoreillon/iot-kernel