pqina/filepond ? reverse-engineered prompt

Build me a polished JavaScript file upload component like FilePond that I can drop into a website and use right away.

It should let people drag and drop files, browse their computer, paste files, and also accept folders, remote file URLs, blobs, and data URIs. I want uploads to work smoothly with async requests, including chunked uploads and a way to send files as base64 when needed. Make it feel really nice to use, with good accessibility, keyboard support, and a layout that adapts well on mobile and desktop.

For images, include the useful basics like resizing, cropping, filtering, and fixing rotated photos from camera metadata. Keep it easy to extend with plugins and simple to plug into a plain JavaScript page. If you need to, look up current docs online for any details that help. Also include a simple demo page so I can see it working end to end.