Add a way to export/import keys from an encrypted file

[elbasel-404]

This serves as a backup mechanism.

[elbasel-404]

@DDoctorzeus any news on this? is this an easy to add feature or would it take time?

[DDoctorzeus]

@elbasel42 Sorry I have had been dealing with fam issues over the last few months and a lot of things have slipped through the net..

Will re-open pull request

[DDoctorzeus]

@elbasel42 I have re-based this into a dev branch as this is exporting without the salt included (this is still being grabbed from the $HOME/.config/gashell/salt file).

It might be better just to tarball the entire config folder and relocate it on import.