Committing in order not to loose the work done

docs/features/admin-gui.md

docs/features/admin-tools.md

docs/features/api-gateway.md

docs/features/cms.md

docs/features/monitoring.md

docs/features/services/authentication.md

docs/features/services/csv-catalog-downloader.md

docs/features/services/elasticsearch/elasticsearch.md

docs/features/services/elasticsearch/indexer.md

docs/features/services/legacy-auth-middleware.md

docs/features/services/mail.md

docs/features/services/media-library.md

docs/features/services/organizations.md

docs/features/services/resources.md

docs/features/web-app.md

docs/overview/index.md