Initial data commit

Task/Conditional-structures/Grain/conditional-structures-3.grain

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+enum Topping { Cheese, Pepperoni, Peppers, Pineapple }
+enum Menu { Pizza(Topping), Calzone(Topping) }
+
+let item = Calzone(Peppers)
+
+match (item) {
+  Calzone(topping) => {
+    if (checkSpecials(topping)) {
+      print("These are half off this week.")
+    } else {
+      print("No current specials.")
+    }
+  },
+  _ => print("No current specials.")
+}