Added Nano RP2040 Connect support

[vovagorodok]

Have same compilation error: https://github.com/JAndrassy/ArduinoOTA/issues/123

For each type of boards we have different solutions:

• RP2040 boards with Pico core. but how to config platformio.ini?
• Nano RP2040 Connect with mbed core with custom storage example and SFU library. solution: https://github.com/JAndrassy/ArduinoOTA/blob/master/examples/Advanced/CustomStorageNanoConnect/CustomStorageNanoConnect.ino