Degree centrality support

[Paulo-21]

What is the expected enhancement?

It would be nice if Rustworkx could support the Degree_centraly features like Networkx.
https://networkx.org/documentation/stable/reference/algorithms/generated/networkx.algorithms.centrality.degree_centrality.html

[IvanIsCoding]

Out of all the centralities discussed in #441, I firmly belive this is one of the easiest ones.

This would be a good first contribution for the folks that want to get started with the library

[TheMLEngineer]

Hi @IvanIsCoding , I want to start contributing. As this is my first time, requesting more info on the requirement. Thanks for your time.

[IvanIsCoding]

Hi @IvanIsCoding , I want to start contributing. As this is my first time, requesting more info on the requirement. Thanks for your time.

1. Understand the formula for Degree Centrality
2. Read https://github.com/Qiskit/rustworkx/blob/main/CONTRIBUTING.md
3. You want to add a pure Rust function in https://github.com/Qiskit/rustworkx/blob/main/rustworkx-core/src/centrality.rs like the other centralities
4. Then wrap your pure Rust function into a Python function in https://github.com/Qiskit/rustworkx/blob/main/src/centrality.rs
5. Test it https://github.com/Qiskit/rustworkx/blob/main/tests/graph/test_centrality.py

[TheMLEngineer]

Thanks , Will submit code

[TheMLEngineer]

Submitted pull request #1145

[Gohlub]

Submitted another pull request with the appropriate fixes: #1306