Update Markdown Helper to write json files for tables and yaml

Helpers/HelperMarkdown.cs

@@ -1311,6 +1311,12 @@ internal static partial class HelperMarkdown
                 continue;
             WriteBlocks(logger, input, markdownFile, fileName, blocks.AsReadOnly());
         }
+        string[] files = Directory.GetFiles(input.Destination, "*.json", SearchOption.TopDirectoryOnly);
+        foreach (string file in files)
+        {
+            if (!fileNames.Contains(file))
+                File.Delete(file);
+        }
     }
 
     private static ReadOnlyCollection<Table> GetTables(string[] lines)