fix(core): Fixes type caching & cleanup (#422)

- [X] Fixes some issues with the type caching
- [X] Changes type check default to ignore case
- [X] Splits out type caching of insensitive and sensitive lists. This means less stuff to iterate through when checking a type against the string.
- [X] Adds an ArrayEnumerator, mostly for reference purposes (copy/paste as needed)

Projects/Server/Mobiles/Body.cs

@@ -1,5 +1,6 @@
 using System;
 using System.IO;
+using System.Runtime.CompilerServices;
 
 namespace Server
 {
@@ -130,6 +131,7 @@ namespace Server
 
         public override string ToString() => $"0x{BodyID:X}";
 
+        [MethodImpl(MethodImplOptions.AggressiveInlining)]
         public override int GetHashCode() => BodyID.GetHashCode();
 
         public override bool Equals(object o) => o is Body b && b.BodyID == BodyID;