Card: list sam_vit_h_4b8939.safetensors with provenance

Add sam_vit_h_4b8939.safetensors (bitwise copy of the upstream ViT-H checkpoint)

Add sam_vit_l_0b3195.safetensors (bitwise copy of the upstream ViT-L checkpoint); card

Add SAM weights in safetensors (bitwise copies of the segment-anything checkpoints), LICENSE, card

initial commit