Add central navigation adapter

app/models/souvap.rb

app/services/souvap/central_navigation_service.rb

app/views/souvap/menu/_top_menu_node.html.erb

...dule/central-navigation/central-navigation.component.html

...dule/central-navigation/central-navigation.component.sass

...module/central-navigation/central-navigation.component.ts

...end/module/central-navigation/central-navigation.model.ts

...d/module/central-navigation/central-navigation.service.ts

frontend/module/main.ts

lib/api/v3/linked_applications/adapters/souvap.rb

...applications/linked_application_collection_representer.rb

.../v3/linked_applications/linked_application_representer.rb

lib/api/v3/linked_applications/linked_applications_api.rb

lib/open_project/souvap/engine.rb