Create base for Onboarding

There should be an onboarding slider to help inform users about the application.

Although the content of this slider does not need to be filled out, the files and functionality should be created now for the architecture and user flow sake.

To resolve this issue, the react-native-onboarding-swiper should be used. The documentation for this can be found here: https://www.npmjs.com/package/react-native-onboarding-swiper

The package react-native-async-storage will also be used to store locally if the user has already seen the pop up. The documentation for this can be seen here: https://react-native-async-storage.github.io/async-storage/docs/install/