Add support for Arduino Nano 33 IoT, MKR1010 WiFi

[brentru]

This pull request:

• Adds support for Arduino Nano 33 IoT, MKR1010 WiFi
• Replaces non-filesystem provisioning example for ESP8266 with new example, examples/Wippersnapper_NoFS/Wippersnapper_NoFS.ino
• Credentials for devices without filesystem support are provided to the object, instead of the provision() function.
• Fixed compilation error with ESP8266 on the I2C component
• New Wippersnapper_WIFININA (src/network_interfaces/Wippersnapper_WIFININA.h) class added to allow users to provide credentials to the wippersnapper object directly from the sketch's user code.
  • Modified Wippersnapper_ESP8266 object to match the change above
• ESP8266, Nano 33 IoT and MKR1010 WiFi added to build matrix.