feat(editor): extract linked doc widget package (#11589)

Close [BS-2738](https://github.com/toeverything/AFFiNE/pull/11589)

blocksuite/affine/blocks/root/src/common-specs/index.ts

@@ -33,6 +33,7 @@ import {
   ToolbarRegistryExtension,
 } from '@blocksuite/affine-shared/services';
 import { dragHandleWidget } from '@blocksuite/affine-widget-drag-handle';
+import { linkedDocWidget } from '@blocksuite/affine-widget-linked-doc';
 import { docRemoteSelectionWidget } from '@blocksuite/affine-widget-remote-selection';
 import { scrollAnchoringWidget } from '@blocksuite/affine-widget-scroll-anchoring';
 import { SlashMenuExtension } from '@blocksuite/affine-widget-slash-menu';
@@ -44,7 +45,7 @@ import { RootBlockAdapterExtensions } from '../adapters/extension';
 import { clipboardConfigs } from '../clipboard';
 import { builtinToolbarConfig } from '../configs/toolbar';
 import { fallbackKeymap } from '../keyboard/keymap';
-import { linkedDocWidget, modalWidget, viewportOverlayWidget } from './widgets';
+import { modalWidget, viewportOverlayWidget } from './widgets';
 
 /**
  * Why do we add these extensions into CommonSpecs?

blocksuite/affine/blocks/root/src/common-specs/widgets.ts

@@ -1,7 +1,6 @@
 import { WidgetViewExtension } from '@blocksuite/std';
 import { literal, unsafeStatic } from 'lit/static-html.js';
 
-import { AFFINE_LINKED_DOC_WIDGET } from '../widgets/linked-doc/config.js';
 import { AFFINE_MODAL_WIDGET } from '../widgets/modal/modal.js';
 import { AFFINE_VIEWPORT_OVERLAY_WIDGET } from '../widgets/viewport-overlay/viewport-overlay.js';
 
@@ -10,11 +9,6 @@ export const modalWidget = WidgetViewExtension(
   AFFINE_MODAL_WIDGET,
   literal`${unsafeStatic(AFFINE_MODAL_WIDGET)}`
 );
-export const linkedDocWidget = WidgetViewExtension(
-  'affine:page',
-  AFFINE_LINKED_DOC_WIDGET,
-  literal`${unsafeStatic(AFFINE_LINKED_DOC_WIDGET)}`
-);
 export const viewportOverlayWidget = WidgetViewExtension(
   'affine:page',
   AFFINE_VIEWPORT_OVERLAY_WIDGET,