* Add draft docs

* Update node-graph.md

* Update whats-new-in-v7-4.md

* Update images and add x-ray link

* Update docs/sources/panels/visualizations/node-graph.md

* Update docs/sources/panels/visualizations/node-graph.md

* Update node-graph.md

* Add definition of node and edge

* Update docs/sources/panels/visualizations/node-graph.md

* Update docs/sources/panels/visualizations/node-graph.md

Co-authored-by: Diana Payton <52059945+oddlittlebird@users.noreply.github.com>