Created Onboarding Screen

[myawesomehub]

I have created the onboarding screen as mentioned in #10 However, I am looking for a better way to write those tags group on 3rd onboarding screen. Third screen is not looking arranged because of not having a proper tags arrangement.

Things I did in this pull request:

• Created a view in file -> view -> onboarding
• Created an enum to manage the onboarding screens