Add application navigation widgets

CHANGELOG.md

lib/flutter_toolbox.dart

lib/nav/application_navigation_definition.dart

lib/nav/cubit/nav_cubit_pages.dart

lib/nav/cubit/nav_cubit_screens.dart

lib/nav/ui/bottom_nav_bar.dart

lib/nav/ui/global_app_bar.dart

lib/nav/ui/screens/about.dart

lib/nav/ui/screens/activity.dart

lib/nav/ui/screens/settings.dart

lib/parameters/application_config_definition.dart

lib/parameters/pages/parameters.dart

pubspec.yaml