Generate syntax highlighting files

[flip111]

Would be cool to generate some syntax highlighting files for web

• https://highlightjs.org/
• https://prismjs.com/

Probably needs #9 first to identify what is what

[Joe Zimmerman]

This is on the roadmap (though I had initially thought of syntax highlighting in IDEs, rather than on the web). However, assigning lower priority for now, as I want to make sure people can get the basic functionality running successfully.