refactor calculation code

- implement fee
- centralize the code

src/hooks/useRestaurant.ts

@@ -0,0 +1,18 @@
+import { updateRestaurant } from "features/order/orderSlice";
+import { useEffect } from "react";
+import { useAppDispatch } from "redux/hooks";
+import { RestaurantDetails } from "utils/types/appTypes";
+
+/**
+ * Custom hook to automatically load restaurant into Redux store
+ * when restaurant data is available
+ */
+export const useRestaurant = (restaurant: RestaurantDetails | undefined) => {
+  const dispatch = useAppDispatch();
+
+  useEffect(() => {
+    if (restaurant) {
+      dispatch(updateRestaurant(restaurant));
+    }
+  }, [restaurant, dispatch]);
+};