feat: Add support for minimal reasoning effort in openai_dart (#760)

Author: davidmigloz

packages/openai_dart/lib/src/generated/schema/create_chat_completion_request.dart

@@ -2650,18 +2650,17 @@ components:
     ReasoningEffort:
       type: string
       enum:
+        - minimal
         - low
         - medium
         - high
       # default: medium # Setting a non-null value triggers an error in non-reasoning models
       default: null
       nullable: true
       description: |
-        **o1 models only**
-
-        Constrains effort on reasoning for
+        Constrains effort on reasoning for 
         [reasoning models](https://platform.openai.com/docs/guides/reasoning).
-        Currently supported values are `low`, `medium`, and `high`. Reducing
+        Currently supported values are `minimal`, `low`, `medium`, and `high`. Reducing
         reasoning effort can result in faster responses and fewer tokens used
         on reasoning in a response.
     Verbosity: