Add support to Azure OpenAI new /openai/v1 endpoints

[sinedied]

There are new endpoints added to Azure OpenAI API bringing 1-1 compatibility with OpenAI API:

• Old endpoint url:
  • AZURE_OPENAI_API_ENDPOINT=AZURE_OPENAI_API_ENDPOINT="https://xxx.openai.azure.com"
• New endpoint url:
  • AZURE_OPENAI_API_ENDPOINT=AZURE_OPENAI_API_ENDPOINT="https://xxx.openai.azure.com/openai/v1"

GenAIScript should detect the new endpoint URL and be able to work with both

[github-actions]

The issue clearly describes the new Azure OpenAI API endpoint format and specifies that GenAIScript should support both old and new endpoint URLs. It would be helpful to clarify:

• Which specific API operations or endpoints need testing for compatibility (e.g., completions, chat, embeddings, etc.)?
• Should GenAIScript auto-detect the endpoint format, or will users always supply the correct one?
• Are there any changes in headers, authentication, or payloads with the new endpoints?
• Is there any urgency or timeline for implementing this?

Additional info on which SDKs/environments are affected would also help.

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