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/Server/Serialization/BinaryFileReader.cs

@@ -131,7 +131,7 @@ namespace Server
 
         public Mobile ReadMobile() => World.FindMobile(ReadUInt());
 
-        public BaseGuild ReadGuild() => BaseGuild.Find(ReadUInt());
+        public BaseGuild ReadGuild() => World.FindGuild(ReadUInt());
 
         public T ReadItem<T>() where T : Item => ReadItem() as T;