Ready for datatable integration, WIP: move datatable component

src/app/metamodel/action/attribute.action.ts

src/app/metamodel/effects/attribute.effects.ts

...multiple/components/result/datasets-result.component.html

...h-multiple/components/result/datasets-result.component.ts

...search-multiple/containers/result-multiple.component.html

...p/search-multiple/containers/result-multiple.component.ts

src/app/search-multiple/store/search-multiple.action.ts

src/app/search-multiple/store/search-multiple.effects.ts

src/app/search-multiple/store/search-multiple.reducer.ts

src/app/search-multiple/store/search-multiple.service.ts