system update doesn't print/log errors

[lucarin91]

This error value

arduino-app-cli/internal/update/event.go

Line 33 in 0509013

Err error // Optional error field for error events

should be printed or logged both on command line and in the handler. We should probably borrow the same or a similar event from start/stop app, check it out here

arduino-app-cli/internal/orchestrator/orchestrator.go

Line 81 in 0509013

type StreamMessage struct {