Dialogue Trees
https://www.gamasutra.com/blogs/EvanTodd/20140519/218041/The_Poor_Mans_Dialogue_Tree.php
https://www.jointjs.com/pricing
https://github.com/ajboni/Talkit
https://www.chatmapper.com/features/
https://www.quora.com/How-do-you-write-dialogue-trees-for-video-games
https://en.wikipedia.org/wiki/Directed_graph
https://github.com/YarnSpinnerTool/YarnEditor
https://www.inklestudios.com/inklewriter/
http://mirror.deusexnetwork.com/dxediting.com/tutorials.php?tutorial=32
https://botwiki.org/resources/libraries-and-frameworks/
https://medium.com/@balramchavan/building-d3-force-graph-editor-angular-7-a9d5cd3cbc97
http://bl.ocks.org/rkirsling/5001347
https://www.yworks.com/pages/angular-graph-component
https://learnwell.github.io/2019/02/09/interactive-directed-graphs.html
https://www.npmjs.com/search?q=directed-graph&page=1
https://github.com/swimlane/ngx-graph
https://github.com/topics/graph-editor
https://stackoverflow.com/questions/48267746/create-graph-with-angular-5