Add plugin for PhET iframe

[veillette]

This issue will document the progress of a Phet mystmd plugin.

[veillette]

Mostly done above with this plugin

/**
 * MyST Plugin for embedding PhET simulations
 * Usage: {phet} simulation-name
 * Options:
 *   width: Width of the iframe (default: 800px)
 *   height: Height of the iframe (default: 600px)
 *   placeholder: Path to placeholder image for static exports
 *   lang: Language code (default: en)
 *   urlOptions: Additional URL parameters
 * Directive Body (parsed)
 *   If provided, this will be the iframe caption.
 */

The only caveat is that the body does not seem to be parsed and therefore the caption does not show on website.

[veillette]

Also the placeholder does not show up in the pdf and word documents.

[FreekPols]

If you want you can share your plugin here: https://github.com/jupyter-book/myst-plugins

[veillette]

Thank @FreekPols . Before contributing back, I think I need to find a way to not break the PDF build. I would like to have a more robust solution before making it more widely available.

By the way, kudos on your classical mechanics mystmd book. I might end up using it next time I teach CM.

[FreekPols]

You can check our iframe replacer! We use it for embedded YT links, it just replaces it with a qr code. Might help!

And thnx, for sure use it. By next summer we have an update.:)