feat: DIA-1716: Google AI Studio (Gemini) support in Prompts

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• feat: DIA-1716: Google AI Studio (Gemini) support in Prompts label-studio-sdk#406

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Codecov Report

All modified and coverable lines are covered by tests ✅

Project coverage is 65.69%. Comparing base (d52ca22) to head (2f80638).
Report is 2 commits behind head on master.

Additional details and impacted files

@@           Coverage Diff           @@
##           master     #357   +/-   ##
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  Coverage   65.69%   65.69%           
=======================================
  Files          49       49           
  Lines        2731     2731           
=======================================
  Hits         1794     1794           
  Misses        937      937           

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