rework dimensions and orientation into Placement, optimise requirements to work on previous candidates, use vec3 for positions

Assets/Engine/Runtime/Requirements/PlaceAnywhere.cs

@@ -7,9 +7,9 @@ namespace EscapeRoomEngine.Engine.Runtime.Requirements
     [CreateAssetMenu(menuName = "Requirements/Place Anywhere")]
     public class PlaceAnywhere : PlacementRequirement
     {
-        protected override IEnumerable<Vector2Int> GenerateCandidates(Module module, Space space)
+        protected override List<Placement> FilterCandidates(List<Placement> candidates, Module module, Space space)
         {
-            return space.rrDimensions.EveryPosition;
+            return candidates;
         }
     }
 }