Update Code and Prototype for ESP32 Pin Layout

# Update Code and Prototype for ESP32 Pin Layout

## Problem

The new Arduino being used for the prototype (ESP32) has a different pin layout to the current Arduino Uno. As a result, the code nor the breadboard prototype will be compatible and need to be updated.

## Solution

- Update the pin definitions in the code to support the Arduino Nano ESP32 pin layout.
- Update the code which interfaces with the BLE module. Currently, we are using a separate BLE module as the Arduino Uno does not come with BLE. However, the ESP32 will come with BLE built in therefore the prototype and code will need to be updated to support the ESP32 BLE functionality.
- Update the wire connections on the breadboard. Hardware Harry has created a circuit layout of the current prototype which you can use as a reference when updating the connections. You do not need to connect the BLE module.