Implement a Tilemap walker for demonstration

Implemented a simple tilemap walker class that slowly moves from the
start to the end along the calculated path.
Revert "Implement a Tilemap walker for demonstration"

This reverts commit d9eb9b7d5813430fad0f1771f36aa65ad6bf34fa.
Revert "Revert "Implement a Tilemap walker for demonstration""

This reverts commit b7416e85c9379c699ca9c6655e514c8cf721fb38.