Home screen implementation

[Sarthak2601]

This issue is tracking the following tasks -

• Correct creation of home activity package inside the already existing UI package.
• Creation of an Activity and a corresponding viewModel class of the activity.
• Correct XML implementation of the screen. The whole XML should be surrounded with tags for DataBinding implementation.
• Setting up of dataBinding and viewModel inside the activity class. For example - See SplashScreenActivity.

Remember - There will be a viewpager kind of implementation of the home activity which will contain 4 fragments. Make the XML implementation accordingly.