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/Serial.cs

@@ -1,4 +1,5 @@
 using System;
+using System.Runtime.CompilerServices;
 
 namespace Server
 {
@@ -17,6 +18,7 @@ namespace Server
 
         public bool IsValid => Value > 0;
 
+        [MethodImpl(MethodImplOptions.AggressiveInlining)]
         public override int GetHashCode() => Value.GetHashCode();
 
         public int CompareTo(Serial other) => Value.CompareTo(other.Value);