Implement stat drop handling for AI, Fixes for Conversion2

PkmnLib.Static/Libraries/TypeLibrary.cs

@@ -84,7 +84,10 @@ public class TypeLibrary : IReadOnlyTypeLibrary
     public IEnumerable<(TypeIdentifier, float)> GetAllEffectivenessFromAttacking(TypeIdentifier attacking)
     {
         if (attacking.Value < 1 || attacking.Value > _effectiveness.Count)
-            throw new ArgumentOutOfRangeException(nameof(attacking));
+        {
+            throw new ArgumentOutOfRangeException(nameof(attacking), attacking,
+                "Attacking type index is out of range.");
+        }
         for (var i = 0; i < _effectiveness.Count; i++)
         {
             var type = _types[i];

PkmnLib.Static/TypeIdentifier.cs

@@ -36,4 +36,7 @@ public readonly struct TypeIdentifier : IEquatable<TypeIdentifier>
 
     public static bool operator ==(TypeIdentifier left, TypeIdentifier right) => left.Equals(right);
     public static bool operator !=(TypeIdentifier left, TypeIdentifier right) => !left.Equals(right);
+
+    /// <inheritdoc />
+    public override string ToString() => Name.ToString();
 }