Can you add a function interface to save the circuit diagram as a graphviz file format?

[libaineu2004]

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