Investigate using `rustworkx` instead of `networkx`

[cognifloyd]

I was curious if there was a faster implementation of networkx. Apparently rustworkx is.

ST2 already uses orjson, which is rust-based. So, another rust-based dep like rustworkx seems reasonable.

I wonder how much of a performance boost rustworkx would provide in orquesta? From a quick search, there are a few API differences between networkx and rustworkx that we'd need to account for to play with that.

A few links:

• https://github.com/Qiskit/rustworkx
• rustworkx for NetworkX users (in the rustwokx docs)
• some very limited benchmarks (in the rustworkx docs)
• a sane recommendation for how to deal with rustworkx requiring integer IDs for nodes in the graph (in the rustworkx docs)

[arm4b]

Nice suggestion. Pretty inspiring benchmarks! Interesting what slice of the entire CPU profile graph-based operations take.

cc @m4dcoder