Use an LLM to aid in generating basic unit tests for all classes

[stiber]

An LLM should be able to generate unit tests that call the methods of a class with parameter values that reasonably cover interesting values (and then check object state and return values). This should be a reasonable start at a comprehensive unit test code base. A human will still need to check that the unit tests make sense. Afterwards, it will only be a small amount of coding to expand on those unit tests.