feat: add text zoom to text viewer

style: fix text viewer formatting

fix: text viewer blink rgb leds when scroll past line

fix: opening empty file

feat: use ledstrip to show vertical scroll

feat: use ledstrip to show file loading bar

refactor: use name and line pointer instead of local variable

fix: text movement

feat: add rotation encoders

refactor: move text view commands to text viewer

feat: add text viewer main