Update dataset card: fix source attribution, premises field, qdep range, ProofWriter vocab sizes, license, citations

Fix premises field, qdep range, license (CC BY-NC-SA 4.0), remove Allen AI reference

Fix source attribution (Kaggle), clarify FOL translation as key preprocessing step, remove script reference

Fix task categories in dataset card

Add dataset card

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Upload dev.jsonl with huggingface_hub

Upload train.jsonl with huggingface_hub

initial commit