Feature Loading Message

## Show a loading message

**Instructions:**

Show a _loading state_ in `` while the data from the server is being fetched. To test this, try loading data from `https://cyf-react.glitch.me/delayed`, which has a 5 second delay before returning the data. You will need to use another state to record when your application is loading data (this can be a boolean) and display a loading message whenever the application is loading data.

**Hint:** Try looking at your Pokemon app for an example.

**Test:**

- [ ] A message inviting the user to wait should be displayed on the screen until bookings data can be rendered on the screen.
- [ ] When bookings are rendered, the loading message should be hidden.