Widen GPT models available

[chriswilty]

Feature Request

Description

We have hard-coded the chat models available, here:
https://github.com/ScottLogic/prompt-injection/blob/dev/backend/src/models/chat.ts#L10

This will need updating whenever OpenAI release a new model, which feels a touch unnecessary. On the other hand, new model GPT-4o does not conform to previous naming strategies, so some intervention could be needed in future anyway.

For now, I suggest a pattern match:

• GPT-[3-9](\.[0-9])?(o)?(-turbo)?$

Screenshots

Acceptance criteria

GIVEN I am logged in and in Sandbox level
WHEN I open the Model Configuration section in the sidebar
AND open the Select Model dropdown
THEN I see all major GPT models available to me (at time of writing: GPT-3.5-turbo, GPT-4, GPT-4o, GPT-4-turbo)