Add dataset card, paper link, and sample usage

Hi, I'm Niels from the community science team at Hugging Face. I've updated the dataset card for this repository to include relevant metadata and documentation.

Specifically, I have:
- Added the `text-generation` task category to the YAML metadata.
- Included links to the paper and the GitHub repository.
- Added a brief description of the benchmark.
- Included dataset statistics for Python, Java, and JavaScript.
- Added a sample usage section with a code snippet found in the GitHub repository.
- Provided the BibTeX citation for proper attribution.

README.md

@@ -1,3 +1,44 @@
----
-license: mit
----
+---
+license: mit
+task_categories:
+- text-generation
+---
+
+# MultiFileTest (ProjectTest)
+
+MultiFileTest (also referred to as ProjectTest) is a multi-file-level benchmark for unit test generation covering Python, Java, and JavaScript. It features 20 moderate-sized and high-quality projects per language, designed to evaluate Large Language Models (LLMs) on more practical and challenging multi-file-level codebases compared to standard single-file benchmarks.
+
+- **Paper:** [MultiFileTest: A Multi-File-Level LLM Unit Test Generation Benchmark and Impact of Error Fixing Mechanisms](https://huggingface.co/papers/2502.06556)
+- **GitHub Repository:** [https://github.com/YiboWANG214/ProjectTest](https://github.com/YiboWANG214/ProjectTest)
+
+## Dataset Statistics
+
+| Language   | Avg. #Files | Avg. LOC | Avg. #Stars | Avg. #Forks |
+|------------|------------|----------|-------------|-------------|
+| Python     | 6.10       | 654.60   | 5810.30     | 996.90      |
+| Java       | 4.65       | 282.60   | 3306.05     | 1347.65     |
+| JavaScript | 4.00       | 558.05   | 17242.30    | 5476.45     |
+
+## Sample Usage
+
+You can load this dataset using the Hugging Face `datasets` library:
+
+```python
+from datasets import load_dataset
+
+# Login using e.g. `huggingface-cli login` to access this dataset
+ds = load_dataset("yibowang214/ProjectTest")
+```
+
+## Citation
+
+If you find this work useful, please consider citing:
+
+```bibtex
+@article{wang2025projecttest,
+  title={ProjectTest: A Project-level Unit Test Generation Benchmark and Impact of Error Fixing Mechanisms},
+  author={Wang, Yibo and Xia, Congying and Zhao, Wenting and Du, Jiangshu and Miao, Chunyu and Deng, Zhongfen and Yu, Philip S and Xing, Chen},
+  journal={arXiv preprint arXiv:2502.06556},
+  year={2025}
+}
+```