Implementing the "clone building under cursor" functionality for Pharaoh

[ravi-donepudi]

My favorite quality of life improvement that Julius/Augustus adds is the "clone building under cursor" functionality.
Could someone suggest how one would go about implementing such a feature for Pharaoh? It would be a lifesaver especially for those folks with large monitors.

Update: Crossposted this to the Akhenaten repo for wider reach,