added models

lib/models/steps.dart

@@ -0,0 +1,13 @@
+/// Used to display the steps required to cook the referenced recipe
+class Steps {
+  final List<CookingStep> steps = [];
+
+  void add(CookingStep step) => steps.add(step);
+}
+
+class CookingStep {
+  final String title;
+  final String description;
+
+  CookingStep({required this.title, this.description = ''});
+}