README: add HF download snippet, document 2-column CSV input, swap example paths to released checkpoint

Add MED4 epoch-4 checkpoint (.pth) and whitelist checkpoints/ in .gitignore

Add MED4 epoch-4 checkpoint used for low-confidence Y2H screening, with sidecar note

Clarify model is ESM-1b-inspired (trained from scratch, modified)

Add YAML model-card front-matter to README

Mirror of github.com/kouroshSA/ppiBTEP

initial commit