Option parsing and skip raw test when flash is too small

[stefanrueger]

Also fixes #6

$ avrdude_test_script.sh -d 0 -p "-c dryrun -p t13" -p "-c dryrun -p m4809"
Testing avrdude version 7.2-20231218 (62b15d20)
Prepare "-c dryrun -p t13" and press 'enter' or 'space' to continue. Press any other key to skip
✅ eesave fuse bit set, cleared and verified
✅ the_quick_brown_fox_1024B.hex flash -U write/verify
✅ the_quick_brown_fox_64B.hex eeprom -U write/verify
✅ lorem_ipsum_1024B.srec flash -U write/verify
✅ lorem_ipsum_64B.srec eeprom -U write/verify
✅ 0xff_64B.hex eeprom -U write/verify
✅ the_quick_brown_fox_1024B.hex:a flash -T write/verify
✅ the_quick_brown_fox_64B.hex:a eeprom -T write/verify
✅ lorem_ipsum_1024B.srec flash -T write/verify
✅ lorem_ipsum_64B.srec eeprom -T write/verify
✅ holes_pack_my_box_1024B.hex:a flash -U write
✅ holes_the_five_boxing_wizards_1024B.hex flash -T write
✅ holes_pack_my_box_64B.hex:a eeprom -U write
✅ holes_the_five_boxing_wizards_64B.hex eeprom -T write
Prepare "-c dryrun -p m4809" and press 'enter' or 'space' to continue. Press any other key to skip
✅ eesave fuse bit set, cleared and verified
✅ the_quick_brown_fox_49152B.hex flash -U write/verify
✅ the_quick_brown_fox_256B.hex eeprom -U write/verify
✅ lorem_ipsum_49152B.srec flash -U write/verify
✅ lorem_ipsum_256B.srec eeprom -U write/verify
✅ 0xff_256B.hex eeprom -U write/verify
✅ the_quick_brown_fox_49152B.hex:a flash -T write/verify
✅ the_quick_brown_fox_256B.hex:a eeprom -T write/verify
✅ lorem_ipsum_49152B.srec flash -T write/verify
✅ lorem_ipsum_256B.srec eeprom -T write/verify
✅ cola-vending-machine.raw flash -T/-U write/verify
✅ holes_pack_my_box_49152B.hex:a flash -U write
✅ holes_the_five_boxing_wizards_49152B.hex flash -T write
✅ holes_pack_my_box_256B.hex:a eeprom -U write
✅ holes_the_five_boxing_wizards_256B.hex eeprom -T write
✅ random_data_64B.bin usersig -T/-U write/read

[MCUdude]

Neat, thanks!