OZG-5977 WIP add multi upload in Kommentare

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

...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

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

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

alfa-client/libs/kommentar-shared/src/lib/kommentar.model.ts

...ng-container/kommentar-form/kommentar-form.component.html

...gang-container/kommentar-form/kommentar-form.component.ts

alfa-client/libs/kommentar/src/lib/kommentar.module.ts

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