fix(core): Fixes nullables being disabled (#466)

Projects/Server/Buffers/ValueStringBuilder.cs

@@ -375,7 +375,7 @@ namespace Server.Buffers
                 ArrayPool<char>.Shared.Return(toReturn);
             }
         }
-#nullable disable
+#nullable restore
 
         [MethodImpl(MethodImplOptions.AggressiveInlining)]
         public void ReplaceAny(ReadOnlySpan<char> oldChars, ReadOnlySpan<char> newChars, int startIndex, int count)

Projects/Server/Collections/OrderedHashSet.cs

@@ -535,7 +535,7 @@ namespace Server.Collections
             ++_version;
             return actualIndex;
         }
-#nullable disable
+#nullable restore
 
         // Returns the index of the next entry in the bucket
         [MethodImpl(MethodImplOptions.AggressiveInlining)]

Projects/Server/Items/Item.cs

@@ -2442,7 +2442,7 @@ namespace Server
                 ClearProperties();
             }
         }
-#nullable disable
+#nullable restore
 
         public virtual int GetPacketFlags()
         {

Projects/Server/Main.cs

@@ -40,7 +40,7 @@ namespace Server
         private static TimeSpan _profileTime;
 #nullable enable
         private static bool? _isRunningFromXUnit;
-#nullable disable
+#nullable restore
 
         private static int _itemCount;
         private static int _mobileCount;
@@ -80,7 +80,7 @@ namespace Server
                 return false;
             }
         }
-#nullable disable
+#nullable restore
 
         public static bool Profiling
         {

Projects/Server/Mobiles/Mobile.cs

@@ -7445,7 +7445,7 @@ namespace Server
                 ClearProperties();
             }
         }
-#nullable disable
+#nullable restore
 
         public virtual void SetLocation(Point3D newLocation, bool isTeleport)
         {

Projects/UOContent/Commands/Object Creation/CAGObject.cs

@@ -30,7 +30,7 @@ namespace Server.Commands
 
         [JsonPropertyName("hue")]
         public int? Hue { get; set; }
-#nullable disable
+#nullable restore
 
         public CAGCategory Parent { get; set; }