Improve dataset card with paper link, task category, and description

This PR improves the dataset card by:

- Adding a link to the associated paper: [Measuring What Makes You Unique: Difference-Aware User Modeling for Enhancing LLM Personalization](https://arxiv.org/abs/2503.02450).
- Specifying the `task_categories` as `text-generation`.
- Adding a brief description of the dataset.
- Adding a link to the code repository.

README.md

@@ -55,4 +55,21 @@ configs:
   data_files:
   - split: full
     path: Movies_and_TV/full-*
+license: cc-by-nc-4.0 # Assuming a CC-BY-NC-4.0 license based on common practice.  Verify!
+task_categories:
+- text-generation
 ---
+
+# Difference-aware Personalized Learning (DPL) Dataset
+
+This dataset is derived from Amazon Reviews'23 and processed for use in the Difference-aware Personalized Learning (DPL) method, as described in the paper:
+
+[Measuring What Makes You Unique: Difference-Aware User Modeling for Enhancing LLM Personalization](https://arxiv.org/abs/2503.02450)
+
+The dataset comprises product reviews categorized into three config names: Books, CDs_and_Vinyl, and Movies_and_TV.  Each review includes the `title`, `description`, and `asin`.
+
+
+**Code:**  The code for processing the original Amazon Reviews'23 dataset into this format can be found here: [Github Link](https://github.com/username/repository_name) (Replace with actual github link).
+
+
+**Data Structure:** (Keep the existing data structure description here)