[Feature Request] Download specific pages of a document

Description The necessary code for this feature is almost entirely already in the code base. :) Case Quite often I need to download only a few pages of a document I have in my paperless-ngx. Currently I have to either download the entire document and then do some local editing on the file or I have to use the "PDF-Editor" in paperless-ngx to select the pages I need to download, then use the "Create new document(s)" button, download that new document and then delete it again from my paperless, because I don't need it in my database. Feature request Please add a "Select pages for download" entry to the "Download" dropdown and basically use the existing PDF-Editor's functionality for selecting pages and creating a new new document based on that selection, to directly download that temporary document with the selected pages directly to the user's device. This would be SO great! :) Thanks a lot for all your awesome work …