Better handling of PokemonLibrary that requires less reflection (but is slightly more verbose)

PkmnLibSharp/Library/GrowthRates/GrowthRateLibrary.cs

@@ -5,6 +5,10 @@ namespace PkmnLibSharp.Library.GrowthRates
 {
     public class GrowthRateLibrary : PointerWrapper
     {
+        internal GrowthRateLibrary(IntPtr ptr) : base(ptr)
+        {
+        }
+
         public GrowthRateLibrary(ulong initialCapacity) : base(
             Creatureliblibrary.Generated.GrowthRateLibrary.Construct(initialCapacity))
         {