OZG-7707 Add svg icons to assets

alfa-client/libs/design-system/src/assets/open-link.svg

alfa-client/libs/design-system/src/assets/orga-unit.svg

alfa-client/libs/design-system/src/assets/ozg-logo.svg

alfa-client/libs/design-system/src/assets/plus.svg

...ibs/design-system/src/assets/request-vorgang-deletion.svg

alfa-client/libs/design-system/src/assets/save.svg

alfa-client/libs/design-system/src/assets/search.svg

alfa-client/libs/design-system/src/assets/send.svg

alfa-client/libs/design-system/src/assets/settings.svg

alfa-client/libs/design-system/src/assets/stamp.svg

alfa-client/libs/design-system/src/assets/statistic.svg

...esign-system/src/assets/undo-request-vorgang-deletion.svg

alfa-client/libs/design-system/src/assets/undo.svg

alfa-client/libs/design-system/src/assets/update.svg

alfa-client/libs/design-system/src/assets/user.svg