Add professional dataset card with HF metadata

README.md

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+---
+language:
+  - kha
+license: cc-by-nc-4.0
+task_categories:
+  - text-generation
+tags:
+  - khasi
+  - monolingual
+  - low-resource
+  - northeast-india
+  - bhasaflow
+  - medharvix
+size_categories:
+  - n<1K
+pretty_name: BhasaFlow Khasi Monolingual Corpus v1
+---
+
+# BhasaFlow Khasi Monolingual Corpus v1
+
+**By [Medharvix Systems Private Limited](https://medharvix.com)**
+
+## Overview
+
+A curated monolingual Khasi text corpus for language modeling, NLP research, and linguistic analysis, with a focus on preserving and digitizing low-resource languages of Northeast India.
+
+## Dataset Structure
+
+| Column | Description |
+|--------|-------------|
+| `khasi_sentence` | Khasi language sentence |
+
+## Usage
+
+```python
+from datasets import load_dataset
+ds = load_dataset("MEDHARVIX-SYSTEMS/bhasaflow-khasi-monolingual-corpus-v1")
+```
+
+## Language
+
+- **Khasi** (kha) - A Khasian language spoken in Meghalaya, India
+
+## License
+
+CC BY-NC 4.0 - For research and non-commercial use.
+
+## Citation
+
+```bibtex
+@dataset{bhasaflow_monolingual_v1,
+  title={BhasaFlow Khasi Monolingual Corpus v1},
+  author={Medharvix Systems Private Limited},
+  year={2026}
+}
+```
+
+## Contact
+
+For inquiries: [Medharvix Systems](https://medharvix.com)