Add pipeline tag and link to code

This PR improves the model card by adding the `pipeline_tag` and a link to the Github code repository, ensuring the model can be found at https://huggingface.co/models?pipeline_tag=image-classification&sort=trending.

README.md

@@ -1,6 +1,8 @@
 ---
 license: bsd-3-clause
+pipeline_tag: image-classification
 ---
+
 Pre-training Dataset: BenthicNet (Production)
 
 Method: Barlow Twins
@@ -9,4 +11,6 @@ Architecture: ResNet-50
 
 Length: 600 Epochs
 
-BenthicNet: https://arxiv.org/abs/2405.05241
+BenthicNet: https://arxiv.org/abs/2405.05241
+
+Codebase: https://github.com/DalhousieAI/pangaea-downloader