OTG: Register Mobile Device

[jgkawell]

Requirements:

• Click add device
• Prompt user to install mobile app (if they haven't already)
• Admin dashboard calls rpc method AddPeer() on server
• Server generates wg private/public key combo, store in blueprint, send to daemon
• Daemon will write the new peer to nix config, and apply nix os configuration
• It will alert the server when nix config is done
• Server will push event to admin dashboard to notify user the Peer has been added.
• Display QR code to scan with in the mobile app that contains the wireguard information