refactor(editor): doc as store extension (#12170)

<!-- This is an auto-generated comment: release notes by coderabbit.ai -->

## Summary by CodeRabbit

- **New Features**
  - Introduced new exports related to workspace management, making additional workspace features available.

- **Refactor**
  - Updated how document and workspace types are imported and exported, consolidating and reorganizing module structure.
  - Shifted dependency management for document instances to use an internal provider mechanism.
  - Streamlined and centralized type imports across various modules.

- **Bug Fixes**
  - Removed an unused schema definition to improve code clarity.

<!-- end of auto-generated comment: release notes by coderabbit.ai -->

blocksuite/framework/store/src/test/test-meta.ts

@@ -5,7 +5,7 @@ import type {
   DocMeta,
   DocsPropertiesMeta,
   WorkspaceMeta,
-} from '../model/index.js';
+} from '../extension/index.js';
 import { createYProxy } from '../reactive/proxy.js';
 
 type DocCollectionMetaState = {