make the workflow graph available via ascent_options

[nicolemarsaglia]

Users might want the flow chart ascent can generate:

ascent/src/libs/ascent/runtimes/ascent_main_runtime.cpp

Line 2154 in 41b58a5

// m_workspace.graph().save_dot_html("ascent_flow_graph.html");

also make it easier for me to not have to remember where this line is when I want to comment it back in

I thought it being in ascent_options would be a good fit, but can be convinced otherwise

[nicolemarsaglia]

Never mind. This lives in ascent.info()

Is it documented?

[cyrush]

It is not, we should add docs:

In python you can use this one-liner:

open("flow_graph.html","w").write(info["flow_dot_graph_html"])

[cyrush]

We could also add an action to save the html.

[nicolemarsaglia]

We could also add an action to save the html.

I like this option.

[cyrush]

add flow_graph_html_filename as an extra optional param to save_info