Feat: Add image send logging

Added a qDebug() statement in hgx11::_sendImage() to log when an image
is created and an attempt is made to send it to the Hyperion server.
This will help determine if the image grabbing and sending pipeline is
active.

hgx11.cpp

@@ -159,6 +159,7 @@ void hgx11::_grabImage()
 
 void hgx11::_sendImage()
 {
+    qDebug() << "Image created, attempting to send to Hyperion.";
     _hclient_p->sendImage(_grabber_p->imgdata_m);
 }