Add pipeline tag and library name

This PR adds the pipeline tag and library name to the model card, ensuring it can be found at https://huggingface.co/models?pipeline_tag=text-generation.

README.md

@@ -1,10 +1,11 @@
 ---
-license: mit
-language:
-- en
 base_model:
 - Qwen/Qwen2.5-7B-Instruct
-
+language:
+- en
+license: mit
+library_name: transformers
+pipeline_tag: text-generation
 ---
 
 GitHub repository: https://github.com/andrewzamai/LLMs-for-Dementia-Diagnosis/tree/main