Chen Zhao

Thanks for the issue. Currently, there is no full documentation for this package. Only some instructions are available in README. Because APIs of `Graphs.jl` are used in `Multigraphs.jl`, you can...

In the current implementation, there is no capability for different weights on different simple edge in a multi-edge. Hence, the shortest path in `Multigraphs.jl` is impossible.

This one uses an ancilla qubit. We also need one without ancilla.

@contra-bit Thanks for the PR. I suggest removing the dependency that is only used in the notebook, and keeping the main package as clean as possible. Perhaps it would be...

@contra-bit Thanks for working on this PR. It looks decent. Before merging this PR, I have only two minor suggestions. - You don't need to keep the original `tutorial.jl` notebook...

Rule p2 and p3 can be applied to boundary spiders theoretically. However, it is not supported in the current version.