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/Server/Serialization/IGenericReader.cs

@@ -16,7 +16,6 @@
 using System;
 using System.Collections.Generic;
 using System.Net;
-using Server.Guilds;
 
 namespace Server
 {
@@ -24,7 +23,6 @@ namespace Server
     {
         string ReadString();
         DateTime ReadDateTime();
-        DateTimeOffset ReadDateTimeOffset();
         TimeSpan ReadTimeSpan();
         DateTime ReadDeltaTime();
         decimal ReadDecimal();
@@ -46,25 +44,9 @@ namespace Server
         Rectangle2D ReadRect2D();
         Rectangle3D ReadRect3D();
         Map ReadMap();
-        IEntity ReadEntity();
-        Item ReadItem();
-        Mobile ReadMobile();
-        BaseGuild ReadGuild();
-        T ReadItem<T>() where T : Item;
-        T ReadMobile<T>() where T : Mobile;
-        T ReadGuild<T>() where T : BaseGuild;
-        List<Item> ReadStrongItemList();
-        List<T> ReadStrongItemList<T>() where T : Item;
-        List<Mobile> ReadStrongMobileList();
-        List<T> ReadStrongMobileList<T>() where T : Mobile;
-        List<BaseGuild> ReadStrongGuildList();
-        List<T> ReadStrongGuildList<T>() where T : BaseGuild;
-        HashSet<Item> ReadItemSet();
-        HashSet<T> ReadItemSet<T>() where T : Item;
-        HashSet<Mobile> ReadMobileSet();
-        HashSet<T> ReadMobileSet<T>() where T : Mobile;
-        HashSet<BaseGuild> ReadGuildSet();
-        HashSet<T> ReadGuildSet<T>() where T : BaseGuild;
+        T ReadEntity<T>() where T : class, ISerializable;
+        List<T> ReadEntityList<T>() where T : class, ISerializable;
+        HashSet<T> ReadEntitySet<T>() where T : class, ISerializable;
         Race ReadRace();
         int Read(Span<byte> buffer);
     }