SUMMER- Convert mine "blocking" area from circle to diamond.

To comply with IARC "block" pathfinding.
We r using cityblock pathing now for the final reported path. We can keep the straightline path as we have been using for actually generating a path the straightline path now needs to follow a diamond shape around a mine.

<img width="1587" height="978" alt="Image" src="https://github.com/user-attachments/assets/5734c7ad-55d6-479a-8eb1-943e317e2335" />