Added backup and restore section

Author: mariadb-mmontes

tools/SUMMARY.md

@@ -13,7 +13,9 @@
   * [Galera Cluster](mariadb-enterprise-operator/galera-cluster.md)
   * [High Availability](mariadb-enterprise-operator/high-availability.md)
   * [MaxScale Database Proxy](mariadb-enterprise-operator/maxscale-database-proxy.md)
-  * [Backup and Restore](mariadb-enterprise-operator/backup-and-restore.md)
+  * [Backup and Restore](mariadb-enterprise-operator/backup-and-restore/README.md)
+    * [Logical backups](mariadb-enterprise-operator/backup-and-restore/logical_backup.md)
+    * [Physical backups](mariadb-enterprise-operator/backup-and-restore/physical_backup.md)
   * [Storage](mariadb-enterprise-operator/storage.md)
   * [TLS](mariadb-enterprise-operator/tls.md)
   * [Configuration](mariadb-enterprise-operator/configuration.md)

tools/mariadb-enterprise-operator/backup-and-restore/README.md

@@ -0,0 +1,18 @@
+---
+description: >-
+  Configure multiple backup strategies and perform restoration.
+layout:
+  title:
+    visible: true
+  description:
+    visible: true
+  tableOfContents:
+    visible: true
+  outline:
+    visible: true
+  pagination:
+    visible: false
+---
+
+# Backup and Restore
+