Spawn a debugger session from a specific point in the timeline

[jonahlibrach]

It would be incredibly useful if we could spawn a debugger session like chrome://inspect from a specific point in the timeline to figure out why we're getting unexpected state changes.

Otherwise, we need to re-run the program (CLI) with debugger enabled every time we get a bug we don't understand by looking at our code.

To me this happens quite frequently.