Adds Severity Field for Licenses Violations for Pull Request Scans

[imranzunzani]

• All tests passed. If this feature is not already covered by the tests, I added new tests.
• This pull request is on the dev branch.
• I used gofmt for formatting the code before submitting the pull request.
• Update documentation about new features / new supported technologies

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Description:

This PR is to add 'Severity' classification to the License Violations' information, for the Pull Request Scan Results. It is related to the issue: #666, as it helps with resolving one aspects discussed in that issue, which is for PR Scans.
This functionality is helpful to differentiate among the levels of violations, for developers to act on, while working on PRs.

It adds the column for 'Severity' as shown in the below screenshot:

This image has been added in the change, to update it as it is referenced in the documentation.

[github-actions]

CLA Assistant Lite bot All contributors have signed the CLA ✍️ ✅

[imranzunzani]

I have read the CLA Document and I hereby sign the CLA

[imranzunzani]

Hi @attiasas ,
Does this require modifications, or is good to approve?

[github-actions]

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🐸 JFrog Frogbot

[attiasas]

LGTM, this change will only affect scan-pull-request command.