Admin => add surveys and databases routes

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

client/src/app/admin/components/admin-nav.component.scss

client/src/app/admin/components/admin-nav.component.ts

...p/admin/components/database/database-table.component.html

...app/admin/components/database/database-table.component.ts

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

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

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

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

...src/app/admin/components/shared/delete-btn.component.html

...t/src/app/admin/components/shared/delete-btn.component.ts

...c/app/admin/components/survey/survey-table.component.html

...src/app/admin/components/survey/survey-table.component.ts

client/src/app/admin/containers/admin.component.html

client/src/app/admin/containers/admin.component.ts

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

.../app/admin/containers/database/database-list.component.ts

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

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

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