Improve dataset card: Add task categories, tags, paper link, and GitHub link

This PR enhances the dataset card by:
- Adding `task_categories: ['object-detection']` to the metadata, as form field detection is an object detection task.
- Adding relevant `tags` such as `document-intelligence`, `form-field-detection`, `pdf`, and `multilingual` for better discoverability and context.
- Providing a link to the paper ([CommonForms: A Large, Diverse Dataset for Form Field Detection](https://huggingface.co/papers/2509.16506)) for easy access to the research.
- Including a link to the GitHub repository ([https://github.com/jbarrow/commonforms](https://github.com/jbarrow/commonforms)) for the associated code.
- Adding a comprehensive description of the dataset based on the paper abstract.

README.md

@@ -1,3 +1,25 @@
----
-license: apache-2.0
----
+---
+license: apache-2.0
+task_categories:
+- object-detection
+tags:
+- document-intelligence
+- form-field-detection
+- pdf
+- multilingual
+---
+
+# CommonForms: A Large, Diverse Dataset for Form Field Detection
+
+This repository hosts the **CommonForms** dataset, a web-scale dataset for form field detection, introduced in the paper [CommonForms: A Large, Diverse Dataset for Form Field Detection](https://huggingface.co/papers/2509.16506).
+
+CommonForms casts the problem of form field detection as object detection: given an image of a page, predict the location and type (Text Input, Choice Button, Signature) of form fields.
+
+**Key Features:**
+*   **Scale:** Roughly 55,000 documents comprising over 450,000 pages.
+*   **Source:** Constructed by filtering Common Crawl to find PDFs with fillable elements.
+*   **Diversity:** Contains a diverse mixture of languages (one third non-English) and domains, with no single domain making up more than 25% of the dataset.
+*   **Purpose:** The first large-scale dataset released for form field detection, aimed at fostering the development of robust form field detectors.
+
+**Paper:** [CommonForms: A Large, Diverse Dataset for Form Field Detection](https://huggingface.co/papers/2509.16506)
+**Code:** [https://github.com/jbarrow/commonforms](https://github.com/jbarrow/commonforms)