Add image + Teachable Machine examples to ml5-next-gen example collection

[QuinnHe]

Hi @ziyuan-linn Peter, can we add examples of image + Teachable Machine to the p5 web editor sketch collection (https://editor.p5js.org/ml5/collections/pUzWMkdmE) so that we can use it on the model page? cc @MOQN @shiffman

This is the script we use within Reference step-by-step guide for image+tm: https://github.com/ml5js/ml5-website-v02-docsify/blob/main/docs/reference/iframes/image-teachable-machine/script.js, if possible, maybe try not to change too much from this so we can avoid too much rewriting 🙏 Thank you!!

[ziyuan-linn]

Sounds good, will make a PR for this in the next-gen repo!