ATS-995, MNT-23248: TIFF to PDF ImageMagick transform don't work

- introducing new custom transformer-misc: ImageToPdf

model/src/main/java/org/alfresco/transform/common/RequestParamMap.java

@@ -64,6 +64,7 @@ public interface RequestParamMap
     String INCLUDE_CONTENTS        = "includeContents";
     String NOT_EXTRACT_BOOKMARKS_TEXT = "notExtractBookmarksText";
     String PAGE_LIMIT              = "pageLimit";
+    String PDF_FORMAT              = "pdfFormat";
 
     // Parameters interpreted by the TransformController
     String DIRECT_ACCESS_URL       = "directAccessUrl";