feat: 准备构建图片生成

Yi.Abp.Net8/module/ai-hub/Yi.Framework.AiHub.Domain.Shared/Dtos/Gemini/GeminiGenerateContentAcquirer.cs

@@ -30,4 +30,16 @@ public static class GeminiGenerateContentAcquirer
             TotalTokens = inputTokens + outputTokens,
         };
     }
+
+    /// <summary>
+    /// 获取图片url，不包含前缀
+    /// </summary>
+    /// <param name="response"></param>
+    /// <returns></returns>
+    public static string GetImageBase64(JsonElement response)
+    {
+        //todo
+        //获取他的base64字符串
+        return string.Empty;
+    }
 }