Initial Code, AWS IoT Library for CircuitPython

[brentru]

Client library for communicating with Amazon AWS IoT from CircuitPython over MQTT.

• __init__ routine checks for =>v1.4.0 of Adafruit's fork of Arduino NINA-W102 and for correct Adafruit MiniMQTT client initialization.
• Certificate/key-based authorization
  • Example certificates.py file included in root of this project.
• Supports AWS IoT topic publish/subscribe
  • Handles AWS IoT Errors
  • Topic validation (per AWS Service Limits)
• Supports AWS IoT's Shadow topic actions (update/delete/get)
  • Included methods for each shadow action