Console.log|warn|error has opt-in|out feature

[peterpeterparker]

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

e.g. the function request of the agent warn in case of errors.

 console.warn(`Expected to find result for path ${path}, but instead found nothing.`);

While this might be hidden in a browser based environment, this can become annoying in a NodeJS environment when the caller handles the errors by themselves.

Concretely: in Juno CLI agent-js adds unexcepted outputs to the terminal.

Describe the solution you'd like
Any console output should be an opt-in or opt-out feature.

Side note:
Btw. I would even remove any information message (console.log) from the library for best performance.