Select some lines and use :StickyLine on them to pin them to the top of the screen while scrolling. Work-in-progress, a lot to do to make this reliable.
Rough demo:
2023-07-23.11-00-51.mp4
Pull requests are welcome, but take a look at CONTRIBUTING.md first for some guidelines. Be sure to abide by the CODE_OF_CONDUCT.md as well.