Task/skyex 52 improve matching layout

[arkadiusz-sapek]

• added user avatar to the header
  • moved header to the bottom of app bar(earlier it was in the title section of appbar but this section have fixed height and cut me avatar)
  • added config for bottom navbar with icon, color(different for each icon) and route

Problem to fix: Navigation from navbar is now broken, Flutter devs didn't add some kind of control to this widget and probably I need to handle this by myself. The bottom navbar is some part of the layout that I can share only on a few pages. I assumed earlier that I can navigate to any page by default app navigator. Tomorrow I will add custom navigation for this widget and separate it from global app navigation(I will create custom nav for this 4 widget which I wanted to use it as the layout and set widget with bottom nav as root).

ps I added factory for BottomNavigatorItem because technically it is not a widget

[arkadiusz-sapek]

I have spell checker, probably I need to change config for dart.