fix: cursor uninitialised fields

fix: fragments when resizing

fix: cursor render coordinates

fix: commands execution out of bounds

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

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

feat: add check for null display address for testing

fix: add missing include guards