Update README.md

Use HTML table to remove header line

Clean up README: intro, usage, details

Fix original/ section description

Fix fine-tuning pipeline: SFT -> GRPO -> DPO

Add model card README

Add prefill trick, retrieval chunks, file chunks, pure insertion filter

Update inference.py with working model loading and inference

Upload inference.py with huggingface_hub

Upload folder using huggingface_hub

initial commit