Ping360 head orientation display option

[ES-Alexander]

Summary

Would be good to have a 'Perspective View' option to set the roll and pitch angle of a Ping360, and warp the plot display accordingly.

Additional information

• Could display white/light on the side that's upwards, and black/dark on the side that's downwards
• Would enable 'birds eye' view of response/distances when viewing the seabed

• Could also integrate ROV pitch/roll when mavlink connected

@patrickelectric I'm not sure how difficult it would be to develop a feature like this. Presumably the black/white background to indicate down/up would be relatively easy, but not sure about the projective transform/directional shrinking of the polar plot (may not be too bad, depending on how the polar plot is implemented at the moment).

[patrickelectric]

This can be easily done using the transformation field and adding a new rotation: https://github.com/bluerobotics/ping-viewer/blob/master/qml/Ping360Visualizer.qml#L115

And adding roll and pitch integration here: https://github.com/bluerobotics/ping-viewer/blob/master/src/sensor/ping360.cpp#L661