xdg-mime-apps: add legacy `mimeapps.list` path
xdg-mime-apps: add legacy `mimeapps.list` path

Although `.local/share/applications/mimeapps.list` is deprecated, this
file is still being read by some applications. To ensure compatibility
duplicate the file as recommended in
https://wiki.archlinux.org/index.php/XDG_MIME_Applications#mimeapps.list

rycee/home-manager,rycee/home-manager,rycee/home-manager