Implementation of the chef license commands

[ashiqueps]

Description

This PR will add the chef license command which can be used to generate the free/trial license for the chef infra. Also if the user has a commercial license, this command can be used to add that as well.

Commands:

• chef license
• chef license add
• chef license list

Related Issue

Types of changes

• [ ] Bug fix (non-breaking change which fixes an issue)
• [x] New feature (non-breaking change which adds functionality)
• [ ] Breaking change (fix or feature that would cause existing functionality to change)
• [ ] Chore (non-breaking change that does not add functionality or fix an issue)

Checklist:

• [ ] I have read the CONTRIBUTING document.
• [ ] I have run the pre-merge tests locally and they pass.
• [ ] I have updated the documentation accordingly.
• [ ] I have added tests to cover my changes.
• [ ] All new and existing tests passed.
• [ ] All commits have been signed-off for the Developer Certificate of Origin.