ftplanner: NetTest by CTU klient

Integrace NetTest mereni viz projekt https://github.com/lwimmer/rmbt-client a jeho wrapper od Turris: https://github.com/CZ-NIC/turris-os-packages/blob/master/net/netmetr/Makefile

@votavon1 @vondrond

To upload designs, you'll need to enable LFS and have an admin enable hashed storage. More information