OZG-7774 add statistic menu

alfa-client/apps/admin/src/app/app.component.html

alfa-client/apps/admin/src/app/app.component.ts

alfa-client/libs/admin/configuration/src/index.ts

...iguration/src/lib/menu-container/menu/menu.component.html

...ration/src/lib/menu-container/menu/menu.component.spec.ts

...ik-menu-container/statistik-menu-container.component.html

...menu-container/statistik-menu-container.component.spec.ts

...stik-menu-container/statistik-menu-container.component.ts

...nu-container/statistik-menu/statistik-menu.component.html

...container/statistik-menu/statistik-menu.component.spec.ts

...menu-container/statistik-menu/statistik-menu.component.ts

alfa-client/libs/admin/shared/src/lib/routes.ts

...tem/src/lib/navbar/nav-headline/nav-headline.component.ts