Add option for user to configure confidence interval scores

Based on score, every detector gets a confidence assigned - low, medium or high.

Default intervals are:
low - 0 to 30
medium - 31 to 70
high - 71 to 100

We should allow user to be able to configure these intervals via cli in the scan subcommand:
```sh
disclosure scan --confidence-scores=low=10,medium=50,high=90
```

This will allow the users to set their own confidence levels and filter the report accordingly.