WIP: dataset page

src/app/metamodel/effects/dataset.effects.ts

...pp/search-multiple/components/dataset-list.component.html

src/app/search-multiple/components/dataset-list.component.ts

...rch-multiple/components/datasets-by-projet.component.html

...earch-multiple/components/datasets-by-projet.component.ts

src/app/search-multiple/containers/datasets.component.html

src/app/search-multiple/containers/datasets.component.ts

...p/search-multiple/containers/search-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.selector.ts