sloproxy

feat(translator): add support for `text.format` conversion in OpenAI to Gemini requests master

- Implemented `applyOpenAIResponsesTextFormatToGemini` to handle `json_object` and `json_schema` formats. - Updated generation config to set appropriate `responseMimeType` and optional `responseJsonSchema`. - Introduced unit tests to validate correct handling of `text.format` conversion scenarios. Closes: #3721


+124
2 changed files