LO GPT module updates

[bradley-erickson]

We recently merged in #178 which moved all GPT related items to their own module. This issue should serve as a running TODO:

• Change from an Object Oriented approach to a Functional Programming approach
• Handle having more than 1 GPT responder available (currently only 1 is supported, but we may want to have different responders for different contexts via PMSS)
• Assess if we can abstract any of the GPT code (many responders are just simple API calls, though some return a list versus a single item)
• Implement test cases
• Add simple GPT interface dashboard for debugging purposes
• Add GPT support for Azure OpenAI #120
• Assess Ollama connection maintenance #144 to see if it is still an issue

[pmitros]

It's worth noting this would involve a major API cleanup. For example, right now, we don't provide adequate information in the calls for the system to know which GPT responder to use (e.g. which module we're calling from, what school, or similar metadata).

This may be a breaking change, so the API should be clearly indicated as non-final.