feat: add image recognition for openai:responses

Author: teamdandelion

python/mirascope/llm/clients/openai/responses/_utils/encode.py

@@ -18,6 +18,7 @@
     response_create_params,
 )
 from openai.types.responses.easy_input_message_param import EasyInputMessageParam
+from openai.types.responses.response_input_image_param import ResponseInputImageParam
 from openai.types.responses.response_input_param import (
     FunctionCallOutput,
     Message as ResponseInputMessageParam,
@@ -78,6 +79,18 @@ def flush_message_content() -> None:
             current_content.append(
                 ResponseInputTextParam(text=part.text, type="input_text")
             )
+        elif part.type == "image":
+            image_url = (
+                part.source.url
+                if part.source.type == "url_image_source"
+                else f"data:{part.source.mime_type};base64,{part.source.data}"
+            )
+
+            current_content.append(
+                ResponseInputImageParam(
+                    image_url=image_url, detail="auto", type="input_image"
+                )
+            )
         elif part.type == "tool_output":
             flush_message_content()
             result.append(