Slither output as CSV format

### Describe the desired feature

## What's The Problem
Slither output in the terminal can become nearly impossible to read if the contract being analyzed is large. In numerous cases I've had to dramatically decrease the font size in my terminal in order to read the text.

## Potential Solution
It would be great if slither had an option to output the results in csv format. This would make it easier for users to review the output.

## Anything Else I Should Know
I would be tempted to build this if any of the devs think this task is doable and can be accomplished without major refactorings, etc. I have not investigated the slither code base so I'm not sure how easy it would be to do this. If it's manageable, I think sometime in the near future I can contribute to building this feature.