feat: add share-storage template and update README for shared network storage

Author: cuisongliu

template/share-storage/README.md

@@ -0,0 +1 @@
+# 共享网络存储

template/share-storage/index.yaml

@@ -0,0 +1,43 @@
+apiVersion: app.sealos.io/v1
+kind: Template
+metadata:
+  name: share-storage
+spec:
+  title: '共享存储'
+  url: 'https://github.com/labring-sigs/templates'
+  gitRepo: 'https://github.com/labring-sigs/templates'
+  author: 'Sealos'
+  description: 'Any share storage'
+  readme: 'https://raw.githubusercontent.com/labring-sigs/templates/main/template/share-storage/README.md'
+  icon: 'https://raw.githubusercontent.com/labring-sigs/templates/main/template/share-storage/nfs.png'
+  templateType: inline
+  categories:
+    - storage
+  defaults:
+    app_name:
+      type: string
+      value: share-storage-${{ random(8) }}
+  inputs:
+    SHARE_STORAGE_SIZE:
+      description: 'share storage size'
+      type: number
+      default: '1'
+      required: true
+    STORAGE_CLASS:
+      description: 'storage class name'
+      type: string
+      default: 'nfs-csi'
+      required: true
+
+---
+apiVersion: v1
+kind: PersistentVolumeClaim
+metadata:
+  name: ${{ defaults.app_name }}
+spec:
+  accessModes:
+    - ReadWriteMany
+  resources:
+    requests:
+      storage: ${{ inputs.SHARE_STORAGE_SIZE }}Gi
+  storageClassName: ${{ inputs.STORAGE_CLASS }}