feat: add mzapo sdl

fix: add linking of gui lib for file browser

docs: add device mount documentation

fix: options to cast to intptr instead of uint

feat: add mime type options

fix: get corret errno on file copy

feat: implement device mount using system

fix: set extern file access correctly

fix: endif comment out name of if

feat: add extern device access

refactor: make fileaccess state from union

feat: add temp file access

feat: add copy and move operations for local filesystem

refactor: do not use dynamic allocation where not needed

feat: add directory list

fix: some file access function types

fix: malloc error handling

feat: add file execute process

feat: add local file access functions

fix: add include guards to path