hook up solenoids, licksensors, and motors to ESP32

[amchagas]

the behavioural side of the system will only need 2 solenoids, 2 licksensors and 2 actuation motors. They need to be connected to the ESP32 (microcontroller taking care of the tasks. see issue #3 )

For the solenoids and licksensors there is already hardware available to make the connection. The motors should be straightforward as we most likely will be using servo motors. here is a little tutorial on how to do so: https://icircuit.net/micropython-controlling-servo-esp32-nodemcu/2385