Warn if the CLI might print sensitive data to the output

[DimitarTachev]

Is your feature request related to a problem? Please describe.
The users could leak some sensitive data like secrets when they share their logs with TRACE level.

Describe the solution you'd like
We could warn them when the log level is set to TRACE

Describe alternatives you've considered
We could try to detect the secrets and replace them with * but I don't believe its possible to cover everything with regexes.

Additional context
The easiest way to leak a secret is by using it in a request query param.

[dtopuzov]

Available in nativescript@rc, will be shipped with nativescript@64.1.