implementation of temporal rich club

[narnolddd]

What changes were proposed in this pull request?

Temporal rich club coefficient -- measures the stability of edges connecting the highest degree nodes, see here for an in-depth definition

Why are the changes needed?

A useful feature for comparing snapshots of temporal networks

Does this PR introduce any user-facing change? If yes is this documented?

Yes, I have documented the python wrapper of this which I assume will be the most used one.

How was this patch tested?

Implemented the toy graph example from the paper.

Issues

Are there any further changes required?

• Doing a bit of cloning which might be avoidable.
• I am calling the assert_eq_f64 from the pagerank tests, could this be moved to a more centralised utils class? Tbh same with the sliding window struct I have made.

[narnolddd]

This is quite slow on persistent graphs, I will try and understand why.