Feature: print out warning of packages which ClearlyDefined couldn't provide license information for

[wwahammy]

Despite best efforts, ClearlyDefined doesn't have license information for every package. This can be due to the package not being indexed yet (it's new), the package requires additional curation on ClearlyDefined to be accurate or the package actually has no valid license. When noticeme requests that one of those packages be included in the NOTICE file, the ClearlyDefined API result includes a list of those packages as warnings. Currently, noticeme simply ignores those warnings.

To complete this feature, noticeme must have the following feature:

• if verifying or updating a NOTICE file, the list of packages with warnings should be displayed to the user.

To complete this feature, noticeme should have the following features:

• a command line argument should exists which turns these warnings into actual errors, i.e. a process error code is returned
• suggestions for how to fix these warnings, i.e. how to provide curation info for that package to ClearlyDefined.