Add physical layout for device graphs

[sesmart]

Describe the feature you'd like

Device paradigm properties already has connectivity, as well as a topology graph, and can be visualized in one or two lines - adding physical locations to a backend would make visualizations trivial.

How would this feature be used? Please describe.

Used for simple device visualization, i.e. through networkx.draw(graph, locations...)

Describe alternatives you've considered

There currently are none programmatically - generating a visualization from the current graph may or may not match the common physical 2d projection.

Unclear if these would have to be hardcoded, but seems likely.

Additional context
Add any other context or screenshots about the feature request here.