feat(editor): scaffolding store and view manager in affine (#11840)

Closes: BS-3254

blocksuite/affine/blocks/bookmark/src/store.ts

@@ -6,7 +6,7 @@ import { BookmarkBlockSchemaExtension } from '@blocksuite/affine-model';
 
 import { BookmarkBlockAdapterExtensions } from './adapters/extension';
 
-export default class BookmarkStoreExtension extends StoreExtensionProvider {
+export class BookmarkStoreExtension extends StoreExtensionProvider {
   override name = 'affine-bookmark-block';
 
   override setup(context: StoreExtensionContext) {

blocksuite/affine/blocks/bookmark/src/view.ts

@@ -12,7 +12,7 @@ import { effects } from './effects';
 
 const flavour = BookmarkBlockSchema.model.flavour;
 
-export default class BookmarkViewExtension extends ViewExtensionProvider {
+export class BookmarkViewExtension extends ViewExtensionProvider {
   override name = 'affine-bookmark-block';
 
   override effect() {