Hidden linux OS and better documentation of hidden os and decoy os features

[evil-user]

Desired behavior

@idrassi @Jertzukka @Chuccle In documentation it is mentioned we can create hidden os and decoy os if we are power user , if documentation has better screenshots its helful for less technical journalists who use this feature in repressive regimes. If hidden os support is in linux for debian / arch / fedora it will be better

Screenshots/Mockup/Designs

Additional information

Your Environment

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