Creates LittleFS filesystem images for embedded devices
Creates LittleFS images for ESP8266, ESP32, Pico RP2040, and RP2350
mklittlefs$ mklittlefs -c ./data -s 0x100000 -o filesystem.bin$ mklittlefs -c ./web_files -s 262144 -o spiffs.bin$ mklittlefs -c ./config -b 4096 -s 0x10000 -o littlefs.bin