fix(core): Fixes several serialization issues (#355)

- [X] Fixes an issue where a buffer smaller than 8 bytes would not double with enough space in some cases.
- [X] Fixes an issue with dupe copying the savebuffer reference (ugh).
- [X] Streamlines the IGenericWriter API to use better generics.
- [X] Streamlines the IGenericReader API to use better generics.
- [X] Forces `tidying` of a List/HashSet to be done externally since Writers/Readers should not have side effects.
- [X] Fixes an issue where Tidying a list didn't TrimExcess, causing memory leaks.
- [X] Reverted the meaning of `World.Running` to specifically refer to any world state post world loading.
  - NOTE: Do not use this if you want to block on world saves. Instead use checks against `WorldState.Saving` states.
- [X] Fixes an issue with serializing negative DateTime deltas.
- [X] Fixes a potential issue with serializing non-UTC DateTime.

Bumps release version

Projects/UOContent/Items/Addons/SHTeleporter.cs

@@ -115,7 +115,7 @@ namespace Server.Items
             var version = reader.ReadInt();
 
             m_Active = reader.ReadBool();
-            m_TeleDest = reader.ReadItem() as SHTeleComponent;
+            m_TeleDest = reader.ReadEntity<SHTeleComponent>();
             TeleOffset = reader.ReadPoint3D();
         }
     }
@@ -302,10 +302,10 @@ namespace Server.Items
 
             External = reader.ReadBool();
 
-            UpTele = (SHTeleComponent)reader.ReadItem();
-            RightTele = (SHTeleComponent)reader.ReadItem();
-            DownTele = (SHTeleComponent)reader.ReadItem();
-            LeftTele = (SHTeleComponent)reader.ReadItem();
+            UpTele = (SHTeleComponent)reader.ReadEntity<Item>();
+            RightTele = (SHTeleComponent)reader.ReadEntity<Item>();
+            DownTele = (SHTeleComponent)reader.ReadEntity<Item>();
+            LeftTele = (SHTeleComponent)reader.ReadEntity<Item>();
         }
 
         public class SHTeleporterCreator