Updates Serialization (#292)

- [X] Removes all save strategies
- [X] Removes duplicate file writer that won't be used
- [X] Removes persistence (it will become a duplicate system)
- [X] Add a save position variable to skip serializing a clean item/mobile
- [X] Update Guilds/Accounts to be IEntity types
    - Because guilds are abstract, this may make serialization tricky.
- [X] Update the generalized IEntity writing
- [X] Update the load/save to write to buffers then to files in background


Bumps release version

Projects/UOContent/Engines/Plants/PlantSystem.cs

@@ -405,7 +405,7 @@ namespace Server.Engines.Plants
             GrowAll();
         }
 
-        private static void EventSink_WorldSave(bool message)
+        private static void EventSink_WorldSave()
         {
             GrowAll();
         }