Model card: a per-file usage table, and document the crowd models

Add the crowd models: pedestrian predictors that drive the crowd, not the robot

Model card: make linres_head.pt loadable without any repository

Document the PICNN and S/T baseline checkpoints in the model card

Add the remaining Foresight-family models: PICNN disruption potential and the k1 S/T causal baselines

Point card at the renamed GitHub repos (crowd-nav = package, crowd-nav-legacy = research)

Add Foresight response models: linear-response operator (headline) + k1 residual; rewrite card

Upload README.md with huggingface_hub

Upload README.md with huggingface_hub

Upload residual_predictor.pt with huggingface_hub

initial commit