feat(arm04): rounding

feat(arm04): switch from \r to \n

fix(arm04): dot position when empty digits

feat(arm04): Do arm04

feat(arm03): add capture button

feat(arm03): null timer while button is held

feat(arm03): pin_write uses sets/reset instead f writing to ODR

fix(arm03): pin read

fix(arm03): ..

feat(arm03): implement display

feat(arm03): add debouncer timer for startstop button

feat(arm03): Update

Init arm01, arm02, arm03