jeromeetienne/jquery-qrcode — reverse-engineered prompt

Build me a tiny jQuery plugin that can generate QR codes directly in the browser. I want to be able to drop one script into a normal web page, add an empty div, and call something like qrcode with either just text or options for width, height, and text.

It should not call any outside service or download an image from somewhere else. The QR code should be created locally so it works fast and keeps working even if the internet is flaky. Keep it simple and lightweight, with a minified version for people who just want to use it.

Please also make a basic example page that shows the default QR code and another one with a custom size, so someone can open the page and immediately understand how to use it. Add a short README with the exact script tag and sample code.