Tons of AI + pathfinding bugfixes:

- waypoints are created between docked subs and removed when they undock
- fixed start waypoint being left out of steering paths
- NPCs won't close doors/hatches on themselves
- NPCs won't let go of ladders until their feet are above the lower edge of the hull
- fixed FindDivingGear "loops": need to find a suit -> need to get to a suit -> need a suit to get to the suit -> need to find a suit...
- fixed characters constantly turning from side to side in small rooms
- recursive function for finding the button which opens a door (so a button doesn't have to be connected straight to a door for an NPC to be able to open it)
- AIObjectiveGetItem keeps searching for more suitable items even if a path to a matching item has been found

Subsurface/Source/Characters/Animation/HumanoidAnimController.cs

@@ -814,7 +814,7 @@ namespace Barotrauma
             }
             else
             {
-                notClimbing = targetMovement.X != 0.0f;
+                notClimbing = Math.Abs(targetMovement.X) > 0.05f;
             }
 
             //stop climbing if: