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/UOContent/Spells/Base/SpellRegistry.cs

@@ -157,8 +157,8 @@ namespace Server.Spells
             for (var i = 0; i < m_CircleNames.Length; ++i)
             {
                 var t =
-                    AssemblyHandler.FindFirstTypeForName($"Server.Spells.{m_CircleNames[i]}.{name}", true) ??
-                    AssemblyHandler.FindFirstTypeForName($"Server.Spells.{m_CircleNames[i]}.{name}Spell", true);
+                    AssemblyHandler.FindTypeByName($"Server.Spells.{m_CircleNames[i]}.{name}") ??
+                    AssemblyHandler.FindTypeByName($"Server.Spells.{m_CircleNames[i]}.{name}Spell");
 
                 if (t?.IsSubclassOf(typeof(SpecialMove)) == false)
                 {