Link model to paper, add usage section

Hi,

This PR ensures the model can be viewed from the paper page and adds a usage section.

README.md

@@ -1,11 +1,15 @@
 ---
 license: bsd-3-clause
-pipeline_tag: optical-flow-estimation
 tags:
+- optical-flow-estimation
 - model_hub_mixin
 - pytorch_model_hub_mixin
 ---
 
 This model has been pushed to the Hub using the [PytorchModelHubMixin](https://huggingface.co/docs/huggingface_hub/package_reference/mixins#huggingface_hub.PyTorchModelHubMixin) integration:
 - Library: https://github.com/princeton-vl/SEA-RAFT
-- Docs: [More Information Needed]
+- Paper: https://huggingface.co/papers/2405.14793
+
+# Usage
+
+Refer to the example script here: https://github.com/princeton-vl/SEA-RAFT?tab=readme-ov-file#custom-usage.