Refactor AI considerations (#1278)

Considerations are now instantiated under a manager and re-used between entities where they pass in their blackboard to get a score back.
Also makes the API a bit nicer to use.
Also some random cleanup.

Co-authored-by: Metal Gear Sloth <metalgearsloth@gmail.com>

Content.Server/AI/WorldState/Blackboard.cs

@@ -56,6 +56,11 @@ namespace Content.Server.AI.WorldState
             }
         }
 
+        public void GetState(Type type, out IAiState state)
+        {
+            state = _states[type];
+        }
+
         /// <summary>
         /// Get the AI state class
         /// </summary>