Invasive Zombies 1.0.3

Improved path validation target blocks with ray casting and path node checks
Fixed targeting behind one-thick unbreakable walls
Introduced slight randomness to avoid unreachable target blocks
Added check for better pathfinding to get closer to the target and stop the block break goal
Implemented zombie idle check for block pathing
Fixed block search on navigation nodes
Added toggleable block pathing visibility for debugging
Tweaked mining ranges