[DOC]: Bring cuGraph website up to date with current and planned NetworkX effort

[acostadon]

How would you describe the priority of this documentation request

High

Please provide a link or source to the relevant docs

https://docs.rapids.ai/api/cugraph/nightly/basics/nx_transition/

Describe the problems in the documentation

Document reflects effort as it was years ago.

• [ ] add status of completed algorithms
• [ ] add links to relavent nx websites
• [ ] add examples to splash page
• [ ] link to existing docs
• [ ] links to plan either from github or other developer docs

(Optional) Propose a correction

incorporate examples and plan as it is now.

Code of Conduct

• [X] I agree to follow cuGraph's Code of Conduct
• [X] I have searched the open documentation issues and have found no duplicates for this bug report