Add hasNewFrame method to check for new captured frames

Author: doblon8

src/main/java/io/github/doblon8/openpnp/capture/CaptureStream.java

@@ -54,6 +54,16 @@ public BufferedImage capture() {
         return image;
     }
 
+    /**
+     * Check if a new frame has been captured.
+     *
+     * @return true if a new frame has been captured, false otherwise.
+     */
+    public boolean hasNewFrame() {
+        int result = Cap_hasNewFrame(context.getSegment(), id);
+        return result == 1;
+    }
+
     /**
      * Check if a stream is open, i.e. is capturing data.
      *