Add pipeline tag and library name

This PR enhances the model card by adding:
- `library_name: transformers`: This enables the automated "how to use" widget for the Transformers library, making it easier for users to get started. The current `Example Codes` section clearly shows compatibility with `transformers.AutoConfig`, `transformers.AutoModel`, and `transformers.AutoTokenizer`.
- `pipeline_tag: feature-extraction`: This improves model discoverability on the Hugging Face Hub under the "feature-extraction" pipeline, accurately reflecting the model's primary function of generating text embeddings.

README.md

@@ -1,10 +1,12 @@
 ---
-license: apache-2.0
 language:
 - en
+license: apache-2.0
 tags:
 - recommendation
 - collaborative filtering
+library_name: transformers
+pipeline_tag: feature-extraction
 ---
 
 # EasyRec-Large