Prepared to receive packets via serial and write them to the internal SD card

[tcpassos]

What's new

• It is now possible to save Marauder pcaps without an SD card attached to the wifi devboard
• Now whenever a sniffing command is executed, the application will listen on the second serial channel (Low Power UART) for packets. If any data is received a file will be created in "appsdata/marauder/(function)(index).pcap".

Verification

• To follow the implementation discussion: https://forum.flipperzero.one/t/it-is-now-possible-to-save-marauder-pcaps-without-an-sd-card-attached-to-the-wifi-devboard/13255
• The Marauder firmware modified to send packets via serial is in this fork, while the merge request is not yet performed: https://github.com/tcpassos/ESP32Marauder
• It is necessary to uncomment "#define WRITE_PACKETS_SERIAL" in configs.h and compile the firmware for the wifi board. Or simply use the binary in the releases tab.
• With the modified Marauder firmware it will be possible to test this PR by going to the "Sniff" menu and starting any sniffing function.
• A file "appsdata/marauder/(function)(index).pcap" must be created if any package is received.

Checklist (For Reviewer)

• [ ] Test whether the PCAP file is created after a scanning function
• [ ] Test that the generated PCAP file is not corrupted