FEAT #8345 Shortcut service

src/frontend/app/app.component.ts

src/frontend/app/app.module.ts

src/frontend/app/home.component.ts

src/frontend/app/menu/main-header.component.html

src/frontend/app/menu/main-header.component.ts

src/frontend/app/menu/menu-shortcut.component.html

src/frontend/app/menu/menu-shortcut.component.ts

src/frontend/css/maarch-material.css

src/frontend/service/shortcut-menu.service.ts