basic callhome functionality#31

Draft

GiacomoCortesi wants to merge 3 commits intonemith:mainfrom

GiacomoCortesi:callhome-patch

Commits on Feb 28, 2023

basic callhome functionality
GCortesi
committed

Commits on Apr 12, 2023

CallHomeTransport interface, handle multiple callhome clients
GCortesi
committed

Commits on May 10, 2023

CallHomeClient channel and ClientError channel
GCortesi
committed