Create web-demo of bitrune parser

This is a thing I've been mostly working out in Rust, but it should be easy enough to port to JavaScript. Build an interface with a grid of 8x8 checkboxes.

task id: bitrune-web-demo

2024-11-13 15:43: Bitrune web-demo: initial steps. #bitrune-web-demo #timelog:00:51:59