Add model card

This PR adds a model card for the paper [REFACT: Adaptive Fact Restatement for Compact and Faithful Chain-of-Thought Reasoning](https://huggingface.co/papers/2607.20833).

It adds a link to the paper page, the license, library name, pipeline tag, and code repository.

Please review and merge this PR if everything looks good.

README.md

@@ -1,3 +1,9 @@
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 license: apache-2.0
+library_name: transformers
+pipeline_tag: text-generation
 ---
+
+This repository contains the model of the paper [REFACT: Adaptive Fact Restatement for Compact and Faithful Chain-of-Thought Reasoning](https://huggingface.co/papers/2607.20833).
+
+Code: https://github.com/NEUIR/REFACT.