Optimization and new area pathfind

The pathfinder part of this resource pack has been updated for optimization, focused mainly on the pathfind for float movement.

1. You can now space out the pathfinding nodes, reducing performance impact.
2. You can now group nodes into areas, pathfinding in blocks between areas, minimizing the performance impact over large areas.
3. You can assign areas with a heavier movement cost, disincentivizing the pathfinder algorithm to move through certain nodes
4. Bug fixes to avoid weird paths.

Consult the documentation and the attribute descriptions for the new changes.