images/edits API support azure endpoint

[qianlnk]

change

，doc:

Describe the change
1、images/edits support azure endpoint
2、ImageEditRequest support multi images for model 'gpt-image-1'

Provide OpenAI documentation link
https://platform.openai.com/docs/api-reference/images/createEdit

Describe your solution

Tests
test unit

Additional context
Add any other context or screenshots or logs about your pull request here. If the pull request relates to an open issue, please link to it.

[codecov]

Codecov Report

Attention: Patch coverage is 43.47826% with 13 lines in your changes missing coverage. Please review.

Project coverage is 85.14%. Comparing base (8c65b35) to head (890560b).

Files with missing lines	Patch %	Lines
image.go	43.47%	9 Missing and 4 partials ⚠️

Additional details and impacted files

@@            Coverage Diff             @@
##           master    #1008      +/-   ##
==========================================
- Coverage   85.49%   85.14%   -0.35%     
==========================================
  Files          43       43              
  Lines        2289     2303      +14     
==========================================
+ Hits         1957     1961       +4     
- Misses        308      315       +7     
- Partials       24       27       +3     

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