Merge branch 'dev' into 'master'

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

See merge request bohacfr2/apo-sem!1

feat: add support for larger fonts

fix: showing unscrollable files correctly

refactor: move gui elements to gui library

feat: use pheripherals in text viewer

fix: text movement

feat: add full vertial scroll command

refactor: move text view commands to text viewer

feat: add gui text view component