refactor: add image viewer fields for better control

fix: add missing include guards

feat: add image region move

feat: add image set and get pixel functions

fix: struct constants

fix: put correct max color constants

refactor: move direction functions to separate module

feat: add basic image viewer loop

feat: add ppm image loading

feat: add basic image functions

feat: add logger

feat: add input handling functions

feat: add display utils functions

feat: add nonblocking io functions

feat: add cursor functions

refactor: add lcd command macro

feat: create initial structure for image-viewer