Merge branch 'dev' into 'master'
Implement first versions of file browser, text viewer and image viewer
See merge request bohacfr2/apo-sem!1
feat: make copy-executable copy another needed files to mz_apo
refactor: minimize filebrowser main functions
refactor: split filebrowser main to more functions
feat: add pheripherals usage to file browser
feat: add plain text default open
feat: add default options, load options on startup
feat: add support for font family
fix: include mzapo sdl only for computer
feat: add file browser main loop