v1.3

Added heap visualization. This is not perfect, but should be good enough for rod dupe testing.

Red = "used slots" ie occupied heap memory
Black = free / unused memory in the heap
Blue = "free slots" memory (I don't fully understand this one)
Magenta = my tool is contradicting itself and believes free and used slots exist in the same spot 🤡

You can toggle which heaps you want to view.