Merge branch 'dev' into 'master'

Implement first versions of file browser, text viewer and image viewer

See merge request bohacfr2/apo-sem!1

fix: set rgb leds to lower brightness

feat: add mzapo sdl

fix: text viewer blink rgb leds when scroll past line

fix: rgb leds time difference

feat: add timeout for rgb leds

fix: rgb leds memory offset

refactor: split pheripherals to separate library