Update README.md

Update README.md

docs: add models used and sponsor prize categories to README

docs: add demo video and LinkedIn post links to README

feat: Off-Brand badge - custom HTML UI with JS bridge to hidden Gradio components

feat: switch to Docker SDK with custom FastAPI frontend at /

fix: back to app.py entry point, custom UI at /paperprof-ui

feat: Off-Brand badge - custom FastAPI+HTML frontend, zero Gradio chrome

feat: initial project structure with all core modules

test: test contributor

initial commit