Formalize Auditor Mode

[alexroan]

Currently, --auditor-mode prints directly to stdout, and has no options for printing to other formats.

Requested formats include:

• Markdown
• CSV
• JSON

This may require restructuring of the AuditorDetector trait and printers.

We should also come up with some way for auditor to choose which auditor detectors to use at any given time. I'm thinking a CLI menu, interactive menu, or list of easily referenced IDs to pick the detector you want at any given time.

[TilakMaddy]

VSCode sidebar - dropdown menu ?

[alexroan]

I think that is a natural follow up once we have a good idea of the CLI flow for it :)