Add an (s)FTP client

[gioman]

To overcome the scenario/problems described here

#5734

it would be very good if it would be possible to sync (project folders) within QField from/to an sftp endpoint.

[nirvn]

@gioman , FYI, QField 3.5 will come with the possibility import a folder from a WebDAV server (and subsequently do basic upload data to / download data from the server). That might be something that interests you.

[gioman]

@nirvn thanks! I knew about this new functionality, so I guess you may want close this ticket. FYI I had conversation with you guys to co-fund the development of this feature, but wasn't able to get all the necessary details (the interested party wanted to know very clearly what it was going to get). Cheers!