Generate Markdown reports for state and state comparisons

[KennethGrace]

I want to use the Python openai package coupled with a user passed API key, to generate plain language reports from our data using the OpenAI api. We should be able to generate reports for both VOSS instances and Comparison instances.

This is probably best implemented through another ABC called Reportable. The Reportable class will require sub-classes to implement __str__ and __repr__. We will use the result of __str__ and __repr__ to format our classes into JSON documents. In addition to implementing these special functions, the class will also be required to implement a "report" method. For convenience, the Report class will implement a generate @classmethod for performing the OpenAI API call functionality.