Added more lint checks and fixed some warnings.

[cmaglie]

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Please check if the PR fulfills these requirements

See how to contribute

• [X] The PR has no duplicates (please search among the Pull Requests before creating one)
• [X] The PR follows our contributing guidelines
• [ ] Tests for the changes have been added (for bug fixes / features)
• [ ] Docs have been added / updated (for bug fixes / features)
• [ ] UPGRADING.md has been updated with a migration guide (for breaking changes)
• [ ] configuration.schema.json updated if new parameters are added.

What kind of change does this PR introduce?

• The biggest part of this PR is fixing small Printf-style formatting errors in the translations, previously those imperfections were very subtle to detect because they are tricky to do right and the linter was silenced.
• Eliminated an unreachable block of code
• Enabled a lot of other minor lint checks

What is the current behavior?

No change

What is the new behavior?

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

No

Other information

[codecov[bot]]

Codecov Report

Attention: Patch coverage is 53.13433% with 471 lines in your changes are missing coverage. Please review.

Project coverage is 70.26%. Comparing base (ba19a2d) to head (7a20b71). Report is 1 commits behind head on master.

Files	Patch %	Lines
internal/arduino/cores/packagemanager/loader.go	3.84%	25 Missing :warning:
.../arduino/cores/packagemanager/install_uninstall.go	42.85%	24 Missing :warning:
commands/cmderrors/cmderrors.go	42.10%	22 Missing :warning:
commands/instances.go	18.51%	22 Missing :warning:
internal/arduino/builder/sizer.go	15.00%	17 Missing :warning:
internal/cli/lib/search.go	45.16%	17 Missing :warning:
internal/arduino/cores/packagemanager/profiles.go	20.00%	16 Missing :warning:
commands/service_upload.go	48.00%	13 Missing :warning:
...al/arduino/cores/packagemanager/package_manager.go	40.00%	12 Missing :warning:
internal/arduino/cores/status.go	0.00%	12 Missing :warning:
... and 93 more

Additional details and impacted files

@@            Coverage Diff             @@
##           master    #2610      +/-   ##
==========================================
- Coverage   70.30%   70.26%   -0.04%     
==========================================
  Files         222      222              
  Lines       21262    21262              
==========================================
- Hits        14948    14940       -8     
- Misses       5131     5147      +16     
+ Partials     1183     1175       -8     

Flag	Coverage Δ
unit	70.26% <53.13%> (-0.04%)	:arrow_down:

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