Feature: Add Scaffold and Drawer

[StanMathers]

https://api.flutter.dev/flutter/material/Drawer-class.html

[FeodorFitsner]

Scaffold is already part of a Page/View. Re: Drawer - it could be implemented, yes. My only concern it's going to look old-ish as M3-version of it is still in the works: https://github.com/flutter/flutter/issues/103551.

Wondering if we could do some better replacement for it, like flying-in container with animation?...