Make library compatible with NINA WiFi module

[facchinm]

Depends on arduino/nina-fw#32 and arduino-libraries/WiFiNINA#74

[per1234]

The change I requested in my previous review has been resolved. Thanks!

[sandeepmistry]

For MKR Vidor 4000, should we document somewhere (maybe the read me) that sketches that contain bitstreams can't be used?

[facchinm]

For MKR Vidor 4000, should we document somewhere (maybe the read me) that sketches that contain bitstreams can't be used?

The readme looks a good place for this info 👍

[per1234]

I would prefer it to be documented in the library reference page. I think that will make the information more visible to the users:
https://www.arduino.cc/en/Reference/WiFi101OTA
That content will need to be updated anyway once this is merged.

[per1234]

Suggested change

	This example connects to an WPA encrypted WiFi network.
	This example connects to a WPA encrypted WiFi network.

[per1234]

Suggested change

	Then it prints the MAC address of the Wifi shield,
	Then it prints the MAC address of the WiFi shield,

[per1234]

Suggested change

	Serial.print("signal strength (RSSI):");
	Serial.print("signal strength (RSSI): ");

[n-gineer]

Should read "SAMD or MEGA AVR"

[CLAassistant]

All committers have signed the CLA.