Added machine-readable IP:PORT in text-mode daemon

[cmaglie]

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• Tests for the changes have been added (for bug fixes / features)
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• configuration.schema.json updated if new parameters are added.

What kind of change does this PR introduce?

When running the daemon in text mode a line with a parable JSON is printed together with the text. This will allow the Arduino IDE to pick this up when running in text-mode with -v logging and --debug enabled.

What is the current behavior?

$ arduino-cli daemon -v --debug
INFO[0000] Using config file: /home/megabug/.arduino15/arduino-cli.yaml 
INFO[0000] arduino-cli version 0.0.0-git                
INFO[0000] Executing `arduino-cli daemon`               
Deamon è ora in ascolto su 127.0.0.1:50051

What is the new behavior?

A line with a machine-readable JSON is added to the output:

$ arduino-cli daemon -v --debug
INFO[0000] Using config file: /home/megabug/.arduino15/arduino-cli.yaml 
INFO[0000] arduino-cli version 0.0.0-git                
INFO[0000] Executing `arduino-cli daemon`               
Deamon è ora in ascolto su 127.0.0.1:50051
{"IP":"127.0.0.1","Port":"50051"}

Does this PR introduce a breaking change, and is titled accordingly?

No

Other information

[codecov]

Codecov Report

Patch coverage has no change and project coverage change: -0.01 ⚠️

Comparison is base (736d161) 36.45% compared to head (6a23182) 36.45%.

Additional details and impacted files

@@            Coverage Diff             @@
##           master    #2101      +/-   ##
==========================================
- Coverage   36.45%   36.45%   -0.01%     
==========================================
  Files         229      229              
  Lines       19587    19588       +1     
==========================================
  Hits         7140     7140              
- Misses      11610    11611       +1     
  Partials      837      837              

Flag	Coverage Δ
unit	36.45% <0.00%> (-0.01%)	⬇️

Flags with carried forward coverage won't be shown. Click here to find out more.

Impacted Files	Coverage Δ
internal/cli/daemon/daemon.go	0.00% <0.00%> (ø)
commands/lib/search.go	88.15% <0.00%> (-3.95%)	⬇️
arduino/cores/packagemanager/package_manager.go	71.07% <0.00%> (+0.61%)	⬆️

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[kittaakos]

Thank you!