Marketing-flow retrofit: hero/midpage/footer CTAs to app.rundiffusion.com/login, prompting library link, 'two ways to run', HTML headings for centering

Refresh model card: banner header, social proof, position v6 as legacy SDXL release, cross-link newer models, drop Auto1111/stale refs

Add generic Juggernaut banner asset

Update README.md

Update README.md

StableDiffusionXLPipeline and Safetensors upload

Update README.md

initial commit