fix: Removes GetObjectsInRange and fixes boat planks closing (#1579)

## BREAKING CHANGE

- Deletes `map.GetObjectsInRange` and `map.GetObejctsInBounds`

### Notes

Developers are expected to enumerate mobiles and items separately now using `map.GetMobilesInRange` and `map.GetItemsInRange`. This helps keep the code streamlined so we don't have to maintain multiple copies of ref struct enumerators that do the same thing.


### Fixes

- [X] Fixes bug with planks closing
- [X] Fixes issue with iterating items/mobiles from a null map

Projects/UOContent/Network/EntityPackets.cs

@@ -27,7 +27,7 @@ namespace Server.Network
 
         public static void SendBatchEntities(this NetState ns, IEnumerable<IEntity> entities, int estimatedCount)
         {
-            if (ns?.HighSeas != true)
+            if (ns?.HighSeas != true || ns.CannotSendPackets())
             {
                 return;
             }