This plugins receives packages with type "kdeconnect.sftp" and reads the
following fields:

ip (string): ip of the curretly active network on device
port (string): port where sftp server starts
user (string): username to connect to sftp server
password (string): one session password to access sftp server
path (string): root directory to access device filesystem

This plugins sends packages with type "kdeconnect.sftp" and fills the
following fields:

startBrowsing (boolean): tell device to start sftp server and noify desktop

<TODO>
random password generation
using encrypted packages
</TODO>