Upload README.md with huggingface_hub

Upload README.md with huggingface_hub

Add universal + breast vSHARP checkpoints; refresh READMEs and inference YAMLs

Docs: install from GitHub via conda + editable .[dev], not PyPI

Add DIRECT JOSS citation to model card

Rewrite model card: clearer docs, dataset links, no checkpoint iters

Fix inference YAMLs: pin single R+ACS; document training schedule + how to override

Docs: note training data/schemes/accels/ACS and how to override at inference

Fix: multi-accel training schedule in inference YAMLs; rename off _4x

Add vSHARP multi-anatomy 4x inference checkpoints (brain/knee/prostate/cardiac)

initial commit