That starship one is nothing special. Sure, it got me to instantly download and install Starship and its recommended NerdFont without having heard of either one or knowing what they do, but I'm sure the page design had nothing to do with it. /s
Starship uses Vuepress, which is amazing. I used it for a side project and not only is the result great, but the setup is also extremely quick and painless. I find it a lot better than Docusaurus (the React equivalent).
Oh, and Starship prompt [2] too.
[1] https://python-poetry.org/
[2] https://starship.rs/