fix(boats): Fixes boat movement issues (#567)

- [X] Fixes entity enumerator short circuiting when it hit a bad case
- [X] Fixes order of moving entities because boat pieces that constitute tiles must be moved after objects that stand on them. (The llama problem).

TODO: Implement packet of packets for displaying boats

Notes:
- In the future, we will have z-sorted lists, and we can iterate from highest to lowest, which will avoid the llama problem naturally.

Projects/UOContent/Multis/Boats/BoatPackets.cs

@@ -48,6 +48,8 @@ namespace Server.Multis.Boats
 
             foreach (var ent in ents)
             {
+                // If we assume that the entities list contains everything a player can see,
+                // then this can be removed and the packet can be written once and copied to improve performance
                 if (!beholder.CanSee(ent))
                 {
                     continue;