docs: tambah model card

README.md

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+---
+license: mit
+tags:
+  - object-detection
+  - yolov8
+  - obb
+  - receipt
+  - ocr
+---
+
+# NotePay — YOLOv8s OBB Receipt Region Detector
+
+Model YOLOv8s dengan Oriented Bounding Box (OBB) untuk mendeteksi 4 region pada struk belanja.
+
+## Classes
+
+| ID | Label |
+|---|---|
+| 0 | nama_toko |
+| 1 | line_item |
+| 2 | tanggal_waktu |
+| 3 | total_belanja |
+
+## Usage
+
+```python
+from ultralytics import YOLO
+from huggingface_hub import hf_hub_download
+
+model_path = hf_hub_download(repo_id="NeoCode77/notepay-yolo-receipt", filename="best.pt")
+model = YOLO(model_path)
+
+results = model("struk.jpg", conf=0.3)
+results[0].show()
+```
+
+## Training
+
+- **Base model:** YOLOv8s-OBB
+- **Dataset:** Receipt images dengan anotasi OBB
+- **Input size:** 640×640
+- **Optimizer:** AdamW, lr=0.001