Support gpt-image-1

[tpaulshippy]

Resolves #200

Seems pretty simple to me. Borrowed the model passing idea from #152

[codecov]

Codecov Report

All modified and coverable lines are covered by tests ✅

Project coverage is 92.23%. Comparing base (12942b7) to head (69fd010).
Report is 1 commits behind head on main.

Additional details and impacted files

@@            Coverage Diff             @@
##             main     #201      +/-   ##
==========================================
+ Coverage   92.11%   92.23%   +0.11%     
==========================================
  Files          91       91              
  Lines        3627     3630       +3     
  Branches      537      534       -3     
==========================================
+ Hits         3341     3348       +7     
+ Misses        286      282       -4     

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[crmne]

Thanks for this @tpaulshippy