feat: add mkdocs-network-graph-plugin

[develmusa]

This pull request adds the mkdocs-network-graph-plugin to the catalog.

[pawamoy]

Thanks! Please fix the CI error 🙂

MkDocs Network Graph Plugin:
     Missing entry point [mkdocs.plugins] 'network-graph'.
     Instead got {'mkdocs.plugins': ['graph']}

[pawamoy]

mkdocs_plugin: network-graph

https://github.com/develmusa/mkdocs-network-graph-plugin/blob/25d356f3a92631b51c31e91df2dc939b18f2cc58/pyproject.toml#L39

It should be graph, or you should update your entry-point.