Hacker News Reader

https://notes.azlen.me/g3tibyfv/ seems to be inspired by Andy Matuschak's notes. They have a Github that might implement this, though there isn't an obvious package to implement this: https://github.com/azlen/azlen.me

Feels like a horizontally aligned version of Tiddlywiki: https://tiddlywiki.com/

Have you tried Obsodian or Roam? The site looks quite a lot like clicking through a Roam graph to me.