feat: support migration (#2852)

packages/env/src/blocksuite/subdoc-migration.ts

@@ -130,6 +130,7 @@ function migrateMeta(oldDoc: Y.Doc, newDoc: Y.Doc) {
   meta.set('workspaceVersion', 1);
   meta.set('blockVersions', blockVersions);
   meta.set('pages', pages);
+  meta.set('name', originalMeta.get('name') as string);
 
   updateBlockVersions(blockVersions);
   const mapList = originalPages.map(page => {

packages/env/src/workspace.ts

@@ -10,6 +10,10 @@ import type { FC, PropsWithChildren } from 'react';
 import type { View } from './filter';
 import type { Workspace as RemoteWorkspace } from './workspace/legacy-cloud';
 
+export enum WorkspaceVersion {
+  SubDoc = 2,
+}
+
 export enum WorkspaceSubPath {
   ALL = 'all',
   SETTING = 'setting',