record-replay...replace

Removed the old record-replay method (Python instrumentation + AST analysis) and replaced it with a MicroPython settrace + AST analysis method... then went and fixed (hopefully) all the things that broke, which was a lot. Hopefully the better approach will make it more robust in the long run, but it's kinda working against the way traditional debugging methods work, so who knows! 🤷‍♂️