Fix: use absolute URLs for images so they render on the org page

Update org card with logo, hero image, and scenario thumbnails

Add image: images/dataset_open.jpg

Add image: images/dataset_ramps.jpg

Add image: images/icon_roundabout.jpg

Add image: images/icon_tcrossing.jpg

Add image: images/hero.jpg

Add image: images/logo.png

Add org card index.html

Add org card README with static SDK frontmatter

initial commit