pdfium-bind: easiest way to add PDF rendering in your Rust app

I got frustrated trying to figure out a way to ship Kiorg with PDFium embedded so its PDF preview feature can just work out of the box in all environments.

That experience resulted in pdfium-bind. A high-level pdfium binding that embeds a pre-built PDFium library into your application directly when static library is not available.

I hope some of you would find this useful as well.