I never knew it's so simple to embed 3D visualizations. How does GitHub do this? How can I do this on my own website? What's the name of the tech I should google?
My guess is you want to start by looking at three.js --I've been on teams using it for a robotics debugging tool with a web interface, and it's definitely a nice library to work with!
The top reply to that comment pointed out that you can rotate the models in GitHub's viewer:
https://github.com/Matsemann/impossible-objects/blob/master/...
https://github.com/Matsemann/impossible-objects/blob/master/...