feat: getopts_long

feat: multithreading using pthread

refactor: separate SDL init to a diff function

feat: show values on text

feat: move around using the mouse

feat: display text with exit iteration of coordinate

refactor: separate functions into files

fix: visual not appearing without event

fix: only calculate points if position has been updated

feat: zoom in and out

feat: SDL3 display

refactor: separate functions into files

feat: basic .ppm output

chore: setup files