Can you add a function interface to save the circuit diagram as a graphviz file format? #60
Description
In addition to execution diagram, you can dump the graph to a DOT format and visualize it using a number of free GraphViz tools.
https://dreampuf.github.io/GraphvizOnline/
// dump the circuit graph to a DOT format through std::cout
circuit.dump(std::cout);
// I found that these open source projects support graphviz format output
https://github.com/taskflow/taskflow
https://github.com/ArsMasiuk/qvge