Add and edit instance => done

client/src/app/admin/admin-routing.module.ts

client/src/app/admin/components/database/index.ts

client/src/app/admin/components/index.ts

client/src/app/admin/components/instance/index.ts

...pp/admin/components/instance/instance-card.component.html

...pp/admin/components/instance/instance-form.component.html

.../app/admin/components/instance/instance-form.component.ts

...pp/admin/containers/instance/edit-instance.component.html

.../app/admin/containers/instance/edit-instance.component.ts

...pp/admin/containers/instance/instance-list.component.html

...pp/admin/containers/instance/instance-list.component.scss

...app/admin/containers/instance/new-instance.component.html

...c/app/admin/containers/instance/new-instance.component.ts

client/src/app/metamodel/store/actions/instance.actions.ts

client/src/app/metamodel/store/effects/instance.effects.ts

client/src/app/metamodel/store/models/instance.model.ts

client/src/app/metamodel/store/reducers/instance.reducer.ts

...nt/src/app/metamodel/store/selectors/instance.selector.ts

client/src/app/shared/shared.module.ts

client/src/styles.scss