DocumentIntelligence to markdown.cs

            // see https://learn.microsoft.com/en-us/rest/api/aiservices/document-models/analyze-document-from-stream?view=rest-aiservices-v4.0%20(2024-11-30)&tabs=HTTP   
            // for parameters

            var analyzeDocumentOptions = new AnalyzeDocumentOptions(
                "prebuilt-layout",
                binaryData)
            {
                OutputContentFormat = DocumentContentFormat.Markdown
            };

            var layoutResult = (await this.client.AnalyzeDocumentAsync(
                WaitUntil.Completed,
                analyzeDocumentOptions)).Value;

            var markdown = layoutResult.Content;