feat: add modal for structure claim + use of ngPlural on search

src/app/shared/components/modal/modal-type.enum.ts

src/app/shared/components/modal/modal.component.html

...pp/structure-list/components/search/search.component.html

...onents/structure-details/structure-details.component.html

...mponents/structure-details/structure-details.component.ts

src/app/structure-list/structure-list.component.html