Improve dataset card: Add metadata and paper/code links

This PR enhances the dataset card by:
- Adding `task_categories: image-text-to-text` to the metadata for better categorization.
- Including `license: other` to accurately reflect the stated license.
- Adding `language: ru` and relevant tags such as `mathematics`, `education`, `vlm`, `assessment`, `russian`, and `handwritten` for improved discoverability.
- Providing direct links to the associated paper ([CHECK-MAT: Checking Hand-Written Mathematical Answers for the Russian Unified State Exam](https://huggingface.co/papers/2507.22958)) and its GitHub repository ([https://github.com/Karifannaa/EGE_Math_Solutions_Assessment_Benchmark](https://github.com/Karifannaa/EGE_Math_Solutions_Assessment_Benchmark)) at the top of the dataset card.

These additions will make the dataset more discoverable and informative for users on the Hugging Face Hub.

README.md

@@ -1,5 +1,22 @@
+---
+task_categories:
+- image-text-to-text
+license: other
+language:
+- ru
+tags:
+- mathematics
+- education
+- vlm
+- assessment
+- russian
+- handwritten
+---
+
 # EGE Math Solutions Assessment Benchmark
 
+[Paper](https://huggingface.co/papers/2507.22958) | [Code](https://github.com/Karifannaa/EGE_Math_Solutions_Assessment_Benchmark)
+
 ## Dataset Description
 
 This dataset contains student solutions to Russian Unified State Exam (EGE) mathematics problems, with reference scores for benchmarking automated evaluation systems.
@@ -122,4 +139,4 @@ If you use this work in your research, please consider citing it.
       primaryClass={cs.CV},
       url={https://arxiv.org/abs/2507.22958}, 
 }
-```
+```