docs: add docs on how to configure models deployed via azure

[bnookala]

I noted that openai models deployed to Azure were possible to utilize via llm, but could not find documentation on how to configure it. Thus, here it is 🎉

This pull request adds documentation for using OpenAI models deployed via Azure OpenAI Service in docs/other-models.md. The most important change is the addition of instructions on how to add the model to the extra-openai-models.yaml file and an example of how to run a prompt against the added model using llm.

Main documentation changes:

• docs/other-models.md: Added documentation for using OpenAI models deployed via Azure OpenAI Service, including instructions on how to add the model to the extra-openai-models.yaml file and an example of how to run a prompt against the added model using llm.