Integrates LLM Azure OpenAI

[yonghuili1]

What problem does this PR solve?

feat: Integrates LLM Azure OpenAI #716

Type of change

• [ ] Bug Fix (non-breaking change which fixes an issue)
• [x] New Feature (non-breaking change which adds functionality)
• [ ] Documentation Update
• [ ] Refactoring
• [ ] Performance Improvement
• [ ] Other (please describe):

Other

It's just the back-end code, the front-end needs to provide the Azure OpenAI model addition form.

Required parameters

• base_url
• api_key