Merge branch 'dev' into 'master'

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

See merge request bohacfr2/apo-sem!1

Merge branch 'docs' into 'dev'

Add final documenttion

See merge request bohacfr2/apo-sem!2

docs: fix doxygen generation

feat: add run file browser make target

feat: make copy-executable copy another needed files to mz_apo

docs: add makefile doxygen generate

fix: add mzapo sdl clean

feat: add mzapo sdl

feat: add file browser base

refactor: move gui elements to gui library

fix: makefile to build always

fix: dependencies for platform switch

fix: makefile correct phony

feat: add text viewer to root Makefile

fix: make Makefile delete old files if architecture is switched

fix: use rpath instead of ld library path

refactor: split pheripherals to separate library

feat: add main Makefile