[FEAT]: Add Silent or Quiet flag for CLI

[jase88]

Is your feature request related to a problem? Please describe.

The output of cyclonedx-npm is pretty noisy, so that you have to scroll the log output.
We're generating a bom for every build with a caching mechanism by nx, but the log is printed every time by that mechanism.

Describe the solution you'd like

• add a new flag --silent (-s) or --quiet (-q) so that the cli
  • only prints errors and suppresses logs or warnings
  • prints a minimal success message

Describe alternatives you've considered

• supressing stdout, but this needs to work cross platform, which makes it complicated

Additional context

[jkowalleck]

Describe alternatives you've considered
supressing stdout, but this needs to work cross platform, which makes it complicated

why "needs to work cross platform"? you run the command on a specific environment you control, right?
Please help me understand.

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Describe the solution you'd like
add a new flag --silent (-s) or --quiet (-q) so that the cli

• only prints errors and suppresses logs or warnings
• prints a minimal success message

I'd disagree. a silent/quite flag should not even print any error messages. it would suppress any log and messaging.
exit code is there for you, to check for success.

[jkowalleck]

feel free to pullrequest a feature as decribed in the following:
see #158

• use a logger, instead of printing directly to STDERR.
• logger would have a configurable level, default to 'warning'.
• logger would print to STDERR.
• logger level can be increased via CLI switch --verbose ... -v|-vv|-vvv

[jkowalleck]

duplicates #158

[jkowalleck]

@jase88 feel free to contribute #158
as it would solve your issue :-)