Delete files hf-results-README.md with huggingface_hub

Card: chart + viewer config

Add viewer data (tidy scores CSV), results chart, viewer config

Add dataset card (contents, settings, sha256, PR link)

BFCL V4 raw result/score bundle: CloudSurf-4B-FC 3 seeds + W0 re-eval/fairness pair + stock E4B bands (harness f7cf735)

initial commit