Add usage example to README

Author: doblon8

README.md

@@ -2,6 +2,44 @@
 
 Java Foreign Function & Memory bindings for [openpnp-capture](https://github.com/openpnp/openpnp-capture).
 
+## Example
+
+```java
+import io.github.doblon8.openpnp.capture.*;
+
+import javax.imageio.ImageIO;
+
+import static io.github.doblon8.openpnp.capture.OpenPnpCapture.*;
+
+void main() throws Exception {
+	System.out.println("openpnp-capture version: " + OpenPnpCapture.getLibraryVersion());
+
+    setLogLevel(LogLevel.INFO);
+    installCustomLogFunction((logLevel, message) -> System.out.println("Log [" + logLevel + "]: " + message));
+
+    try (var capture = new OpenPnpCapture()) {
+        var device = capture.getDevices().stream()
+                .findFirst()
+                .orElseThrow(() -> new CaptureException("No capture devices found."));
+
+        var format = device.getFormats().stream()
+                .findFirst()
+                .orElseThrow(() -> new CaptureException("No formats found."));
+
+        try (var stream = device.openStream(format)) {
+            TimeUnit.SECONDS.sleep(1); // let the camera initialize
+
+            var zoomLimits = stream.getPropertyLimits(CaptureProperty.ZOOM);
+            System.out.println("Zoom limits: " + zoomLimits);
+
+            var image = stream.capture();
+            ImageIO.write(image, "png", new File("/tmp/image.png"));
+            System.out.println("Captured image saved to /tmp/image.png");
+        }
+    }
+}
+```
+
 ## License
 
 This project is licensed under the MIT License, the same as the `openpnp-capture` library.