Update navigation library and refactor template to expose event callback to navigate

[kaungkhantsoe]

Why

Our template does not follow Google recommended Unidirection Data Flow

• We need to refactor it to follow the compose's Unidirection Data Flow as we do in many of our client projects
• To do so, we will refactor the whole project to navigate through event callbacks and remove navigator from the Screen level and ViewModel level
• We will also apply some useful custom extensions from our client's project, like NavController.navigate

Who Benefits?

Developers