fix(core): Removes some uses of Linq (#421)

- [X] Removes some uses of linq
- [X] Creates struct based enumerator for Skills
- [X] Creates a struct based enumerator for TypeCache
- [X] Changes HarvestDefinition to an init array instead of List
- [X] Changes HeritageTokenGump Response from List to Array

Projects/Server/ContextMenus/ContextMenu.cs

@@ -1,5 +1,4 @@
 using System.Collections.Generic;
-using System.Linq;
 
 namespace Server.ContextMenus
 {
@@ -64,7 +63,21 @@ namespace Server.ContextMenus
         /// <summary>
         ///     Returns true if this ContextMenu requires packet version 2.
         /// </summary>
-        public bool RequiresNewPacket =>
-            Entries.Any(t => t.Number < 3000000 || t.Number > 3032767);
+        public bool RequiresNewPacket
+        {
+            get
+            {
+                for (var i = 0; i < Entries.Length; ++i)
+                {
+                    var number = Entries[i].Number;
+                    if (number < 3000000 || number > 3032767)
+                    {
+                        return true;
+                    }
+                }
+
+                return false;
+            }
+        }
     }
 }