OZG-5977 complete PoC and adjustements due to kommentar

...ient/libs/binary-file-shared/src/lib/binary-file.model.ts

...bs/binary-file-shared/src/lib/binary-file.service.spec.ts

...nt/libs/binary-file-shared/src/lib/binary-file.service.ts

alfa-client/libs/binary-file-shared/test/binary-file.ts

...r-new/binary-file-attachment-container-new.component.html

...ew/binary-file-attachment-container-new.component.spec.ts

...ner-new/binary-file-attachment-container-new.component.ts

...-attachment-new/binary-file-attachment-new.component.html

...tachment-new/binary-file-attachment-new.component.spec.ts

...le-attachment-new/binary-file-attachment-new.component.ts

alfa-client/libs/binary-file/src/lib/binary-file.module.ts

...-file-upload-editor/multi-file-upload-editor.component.ts

...container/multi-file-upload-list-container.component.html

...tainer/multi-file-upload-list-container.component.spec.ts

...t-container/multi-file-upload-list-container.component.ts

...upload-list-item/multi-file-upload-list-item.component.ts

...load-list-item/multi-file-upload-list-item.component.html

...d-list-item/multi-file-upload-list-item.component.spec.ts

...upload-list-item/multi-file-upload-list-item.component.ts

...ti-file-upload-list/multi-file-upload-list.component.html