Add dataset card, link to paper

This PR ensures the dataset is linked to (and can be found at) https://huggingface.co/papers/2501.04828.

README.md

@@ -1,3 +1,10 @@
----
-license: cc-by-nc-4.0
----
+```yaml
+---
+license: cc-by-nc-4.0
+task_categories:
+- text-classification
+language:
+- tr
+---
+```
+This repository contains the dataset presented in the paper [Building Foundations for Natural Language Processing of Historical Turkish: Resources and Models](https://huggingface.co/papers/2501.04828).