feat: add zooming to cursor

fix: add packed attributes to needed structs

fix: movement within border underflow of unsigned integer

fix: cursor size to look natural

refactor: unify cursor functions

refactor: add option to clear display without render

feat: add option to run on x86 computer with sdl

feat: add possibility to write only to part of the display

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