Add compliance policies command

Create the policies subcommand in compliance to house the new functionality.

Refer to the command documentation for information on the structure.

Acceptance Criteria

• Create the bbctl compliance policies cobra.Command
• Fill out the short, long, and example usage with expected usage
• policies command will call the compliance dashboard API endpoint: /policy-scans - gets policy data from kyverno
• Display all data returned from endpoint
• If compliance dashboard is not available return "compliance dashboard not found"
• Write unit tests. Tests should be able to test the arguments passed in, command creation, etc. Output does not need to be validated at this time.