More abilities, implemented support for form inheritance

PkmnLib.Dynamic/Libraries/DataLoaders/SpeciesDataLoader.cs

@@ -76,6 +76,20 @@ public static class SpeciesDataLoader
                 $"Egg cycles for species {id} is invalid: {serialized.EggCycles}. Must be greater than or equal to 0.");
         }
 
+        foreach (var form in serialized.Formes)
+        {
+            if (!string.IsNullOrEmpty(form.Value.InheritFrom))
+            {
+                var inheritedForm = serialized.Formes.GetValueOrDefault(form.Value.InheritFrom);
+                if (inheritedForm == null)
+                {
+                    throw new InvalidDataException(
+                        $"Form {form.Key} inherits from {form.Value.InheritFrom}, but that form does not exist.");
+                }
+                form.Value.MakeInheritFrom(inheritedForm);
+            }
+        }
+
         var forms = serialized.Formes.ToDictionary(x => (StringKey)x.Key,
             x => DeserializeForm(x.Key, x.Value, typeLibrary));
         var evolutions = serialized.Evolutions.Select(DeserializeEvolution).ToList();