Update loops.md Documentation with better images and "Continue" example.

[leohpark]

Updated initial loop and subsequent loop descriptions with step-by-step instructions and new images.

Added "Continue" port usage image, description, and example.

I know that I haven't placed the image assets in the correct location, and I'm not entirely sure how to do that. Probably involves forking more things. If someone can explain that to me briefly, I can make better documentation PRs in the future, thanks.

[abrenneke]

Yeah @leohpark looks like you have GitHub URLs in the docs instead of bringing the images into the project itself. Did you use the github UI to make these changes? That might be why. You might have to clone the repo, put the images in the packages/docs/docs/user-guide/assets folder, and link to them relatively like the other URLs. I can help on discord if you need it.

[abrenneke]

Feel free to reopen if you get back to this