Add s2 mini dev board support

[lewibt01]

Adding support for ESP32-S2FN4R2 mini dev boards. Serial0 defaults to pins 43/44, which aren't made available to the end user on the breakout board. I've added a new board definition that allows users to selectively change these pins to ones that are accessible on the dev board.

[yyewolf]

Have you managed to make this work ? I have a modified version of the firmware that doesn't work.. I disabled BT because the ESP32 S2 N4R2 doesn't have it and got to the CLI ">" displayed on the Flipper (on reset) but commands don't work..

[lordrak007]

Hi, several months ago i change only one line in code (Serial.begin(115200) -> Serial.begin(115200, SERIAL_8N1, 17, 18);) and i was able to use Marauder with thi device. (Lolin S2 mini based on ESP32-S2FN4R2) But with latest source code does not working bacause something changed and i am getting error esp32_marauder:190:42: error: no matching function for call to 'USBCDC::begin(int, SerialConfig, int, int)' Serial.begin(115200, SERIAL_8N1, 17, 18); Changed Serial to Serial1 also does not working. Do you have any sugestion to to solve it? Thank you