Add target2latent goal heads (mlp, mlp_z, shortcut, shortcut_z) under point-lewm and point-delta-jepa; README section

README: citation block, arxiv tag

dino-wm: drop accelerate forward-wrapper attributes from the pickled modules (ClamAV getattr heuristic)

Add OGB-Cube world-model checkpoints (point-lewm, point-delta-jepa, image-delta-jepa, utonia-wm, dino-wm)

initial commit