doc:add backup dir and add backup introduce

Signed-off-by: Xieql <xieqianglong@huawei.com>

docs/content/en/docs/fleet-manager/backup/_index.md

@@ -0,0 +1,40 @@
+---
+title: "Unified Backup, Restore, and Migrate"
+linkTitle: "Unified Backup"
+weight: 3
+description: >
+  The easiest way to manage multi cluster Unified Backup, Restore, and Migration with Fleet.
+---
+
+Kurator introduces a unified solution for backup, restore, and migration across multiple clusters in Fleet.
+This feature, integrated with [Velero](https://velero.io/), simplifies the process of managing backups, restoring data, and migrating resources across clusters through a streamlined one-click operation.
+
+The following are the main benefits of this feature.
+
+- **Simplified Multi-cluster Operations**: Streamlining management and operational tasks across various clusters for easier resource handling.
+
+- **Backup Support with Scheduled and Immediate Options**: Automate regular backups for data protection and compliance, along with immediate backup options for on-demand needs.
+
+- **One-stop, Flexible Disaster Recovery Solution**: Providing a robust and flexible solution for disaster recovery, allowing tailored recovery of specific resources in specific clusters to ensure operational continuity in adverse scenarios.
+
+- **Effortless Cluster Resource Migration**: Facilitating smooth migration of resources across multiple clusters for workload balancing or transitions to new environments.
+
+- **Unified Status View**: Offering a clear, unified view of resources and backup statuses across clusters, enhancing visibility and control.
+
+## Architecture
+
+Below is the architecture diagram of the Kurator Fleet Backup feature.
+
+{{< image width="100%"
+link="./image/backup-arch.svg"
+>}}
+
+The diagram illustrates:
+
+- **Fleet Manager**: The central management entity, responsible for orchestrating the operations.
+- **Velero Integration**: How the backup and restore processes are handled using Velero.
+- **Object Storage**: The external storage solutions, such as Minio or cloud providers, where the backups are stored.
+- **Interactions**: The arrows depict the flow of data and interactions between various components.
+
+To use Kurator for backup, restore, and migration scenarios, you must first configure and install the necessary backup engine plugin.
+Please refer to the subsequent sections for detailed guidance on plugin configuration and instructions for each specific operation.

docs/content/en/docs/fleet-manager/backup-plugin.md → docs/content/en/docs/fleet-manager/backup/backup-plugin.md

@@ -8,23 +8,6 @@ description: >
 
 To support Kurator's unified backup, restore, and migration features, it's imperative to first configure the backup plugin for [Fleet](https://kurator.dev/docs/references/fleet-api/#fleet). This guide will walk you through configuring the [Velero](https://velero.io/)-based backup plugin for Fleet, laying the groundwork for Kurator's unified backup, restore, and migration capabilities.
 
-## Architecture
-
-Before diving into the specifics, let's take a moment to understand the overall architecture and how various components interact with each other. Below is the architecture diagram of the Kurator Fleet Backup Plugin.
-
-{{< image width="100%"
-    link="./image/backup-arch.svg"
-    >}}
-
-The diagram illustrates:
-
-- **Fleet Manager**: The central management entity, responsible for orchestrating the operations.
-- **Velero Integration**: How the backup and restore processes are handled using Velero.
-- **Object Storage**: The external storage solutions, such as Minio or cloud providers, where the backups are stored.
-- **Interactions**: The arrows depict the flow of data and interactions between various components.
-
-With this architectural view in mind, let's proceed with the essential setup steps and configurations required to implement this architecture.
-
 ## Prerequisites
 
 ### 1. Fleet Manager Setup