#22: implement onboarding page

...ense-profile/model-details-license-profile.component.html

...icense-profile/model-details-license-profile.component.ts

...mponents/model-management/model-management.component.html

...oad-license-profile/upload-license-profile.component.html

...pload-license-profile/upload-license-profile.component.ts

src/app/shared/models/index.ts

src/app/shared/models/message-status.model.ts

src/app/shared/models/navigation-label.model.ts

src/assets/images/ico-checkmark.png

src/assets/images/ico_add_to_repository.png

src/assets/images/ico_add_to_repository_green.png

src/assets/images/ico_add_to_repository_red.png

src/assets/images/ico_create_micro_service.png

src/assets/images/ico_create_micro_service_green.png

src/assets/images/ico_create_micro_service_red.png

src/assets/images/ico_not_yet_onboarded.png

src/assets/images/loading_deactive.png

src/assets/images/stepper_progress_completed.png