Created sub-directory for png_to_array script

script/keyboard_png/key.png

script/keyboard_png/key.txt

script/keyboard_png/key_R.png

script/keyboard_png/key_R_long.png

script/keyboard_png/key_long.png

script/keyboard_png/keyboard_layout.drawio

script/keyboard_png/png_to_array.py

script/keyboard_png/space.png

script/keyboard_png/space_R.png