fix: Disable logging by default in nlu to fix 'Epoch' log message

[wickedest]

Pull Request Template

Thanks for nlp.js. There is an issue in that it logs these messages:

Epoch 513 loss 0.004655355635269023 time 0ms

PR Checklist

• I have run npm test locally and all tests are passing.
• I have added/updated tests for any new behavior.
• If this is a significant change, an issue has already been created where the problem / solution was discussed: [N/A, or add link to issue here]

PR Description

The nlu was configured to log by default. I am pretty sure that it cannot be disabled programmatically because there are no settings passed into it from the nlu. It is also extremely annoying to have these log messages output by default. All I did was disable it, but imo, it should probably be using the configured logger, instead of a console.log. I'd also expect that maybe some settings should be passed into the train().

[sonarcloud]

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