Add metadata and link to code

This PR ensures the model can be found via the `text-generation` pipeline tag and adds a link to the code repository. It also adds the `transformers` library name and Apache 2.0 license to the model card.

README.md

@@ -1,3 +1,11 @@
+---
+license: apache-2.0
+library_name: transformers
+pipeline_tag: text-generation
+---
+
+This repository contains the safety probers and the refusal head presented in the paper [SafeSwitch: Steering Unsafe LLM Behavior via Internal Activation Signals](https://huggingface.co/papers/2502.01042). SafeSwitch dynamically regulates unsafe outputs by monitoring LLMs' internal states.
+
 Refer to our [code repo](https://github.com/Hanpx20/SafeSwitch) for usage.
 
 `refusal_head.pth`: the refusal head.
@@ -6,6 +14,6 @@ Refer to our [code repo](https://github.com/Hanpx20/SafeSwitch) for usage.
 
 `stage1_prober/`: the prober to predict unsafe inputs from the last layer tokens.
 
-`stage2_prober/`: the prober to predict mdoel compliance after decoding 3 tokens.
+`stage2_prober/`: the prober to predict model compliance after decoding 3 tokens.
 
 All probers are 2-layer MLPs with intermediate sizes of 64.