Upload xgboost/README.md with huggingface_hub

xgboost/README.md

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+---
+license: mit
+tags:
+- pectin
+- chemical-engineering
+- machine-learning
+- regression
+---
+
+# Xgboost - Pectin Production Model
+
+XGBoost model with excellent performance on tabular data
+
+## Usage
+
+```python
+from huggingface_hub import hf_hub_download
+import joblib
+
+model_path = hf_hub_download(
+    repo_id="arabovs-ai-lab/PectinProductionModels",
+    filename="xgboost/model.pkl",
+    repo_type="model"
+)
+
+model = joblib.load(model_path)
+```
+
+## Model Details
+
+- **Type**: XGBoost
+- **Training Data**: 1000 experimental records
+- **Features**: 6
+- **Targets**: 4
+