Implement a core API wrapper.

So far this has been a major revamp. The OpenAI settings admin now has two tabs, one to show all available (useful) models, and a link to the OpenAI docs.

All forms that have model selection are being replaced from a hard coded list to a dynamic list directly from OpenAI. This will allow the use of models as soon as they are published, versus waiting to be 'added' to the code.

So far, the completion/chat functionality is working, the CKEditor, Prompt, and ChatGPT Explorer subform modules have been updated.

Automatically closed - issue fixed for 2 weeks with no activity.