Add Azure OpenAI Support

[gmuffiness]

Update the OpenAI package to support Azure OpenAI models with minimal code changes.
I referred to the code here (openai node)

I checked that OpenAI model functionality remains unaffected.

related issue : #389

(p.s. I plan to contribute various features, so instead of the main branch, I made a separate feature branch and reopen the PR.)

[Zgrill2]

What was your reasoning for the design choice to not use the AzureOpenAI class provided by the openai library?

[gmuffiness]

I saw from the link that it seemed possible to achieve the same functionality using the OpenAI library, so I aimed for minimal changes in my implementation.

However, it does seem like this approach is becoming somewhat deprecated, so using the AzureOpenAI class looks like the better option. I noticed your recent PR, and that approach also looks good, so I’ll go ahead and close this PR.