Model card: add Usage section

README.md

@@ -24,6 +24,19 @@ No learned parameters were modified. The only change is state-dict key
 remapping so that upstream checkpoints load into LibreYOLO's module
 naming scheme.
 
+## Usage
+
+```bash
+pip install libreyolo
+```
+
+```python
+from libreyolo import LibreYOLO
+
+model = LibreYOLO("LibreYOLOXn.pt")
+results = model("image.jpg", save=True)
+```
+
 ## License
 
 Apache License 2.0. See the [`LICENSE`](./LICENSE) and [`NOTICE`](./NOTICE)