What is the difference between a pop and a push in Flutter?
In Flutter, both "pop" and "push" are related to navigation and managing routes in an app.
"Push" is used to navigate from one screen to another. When a new screen is pushed onto the navigation stack, it becomes the topmost screen and the user can see its contents. This is done using the `Navigator.push()` method.
"Pop" is used to remove the current screen from the navigation stack and return to the previous screen. This is done using the `Navigator.pop()` method. When `pop()` is called, the current screen is removed from the stack and the previous screen becomes the topmost screen, and its contents become visible.
In other words, "push" adds a new screen to the navigation stack, while "pop" removes the current screen from the stack.
