feat: add image write to display

feat: add image direct write to display

feat: add image upscale using nearest-neighbor

feat: add image downscale using average

fix: image viewer function to display image

feat: check for errors when loading image

refactor: make move cursor handlers to one function

fix: logger add default switch case for log modes to prevent invalid memory access

fix: add check for errors to main function

fix: remove unused piece of nonblocking io code

refactor: add image viewer fields for better control

feat: add check for null display address for testing

fix: add missing include guards

feat: add image region move

feat: add image set and get pixel functions

fix: ppm image loading

feat: use floats instead of doubles

fix: struct constants

fix: put correct max color constants

refactor: move direction functions to separate module