Add improvement suggestions to documentation

[yvonneanne]

Add the following bullet points to documentation PDF

Ideas for product extensions/usability improvements

• Extend preview to include videos and PDFs could be shown in iframe
• “Select a file” could also act as a draggable target, same for the upload field itself (e.g., by making it a label?)
• Fix label for file upload, it says “fileNfile-selectorame” but the id of the field is: “file-selector”
• List files and request on the same start screen, segment the list into two parts
• Add an optional description field for the file you are requesting (instead of name only)
• Use AI to name the file you are uploading (recognize what is on the picture or document)
• Avoid overlays/popups (considered to be UX antipattern)
• Instead of sharing with a user, create a one-time link to send (add decryption key for logged in users opening it)
• If requests and files would be on the same overview, navigation would not be needed, instead just a nice call to action to create a request and upload a file (in place, not in a popup)
• When default email is set to browser, e.g., with gmail, the behavior when clicking on “send email” in file requests is unexpected and clunky
• Replace list of all users in sharing with more advanced search functionality (currently all users are shown + autocomplete)