refactor(editor): extract selected rect widget (#12290)

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

## Summary by CodeRabbit

- **New Features**
  - Introduced the Edgeless Selected Rectangle widget, providing enhanced selection and interaction capabilities in edgeless mode.
  - Added rotation-aware resize cursors for improved usability when resizing selections.
  - Integrated new autocomplete panels and selection components for a smoother user experience.

- **Refactor**
  - Modularized the Edgeless Selected Rectangle widget as a standalone package for better maintainability and integration.
  - Updated internal references and imports to utilize the new widget package.

- **Chores**
  - Updated project and package configurations to include the new widget and ensure proper build and type-checking across the workspace.

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

blocksuite/affine/all/src/extensions/view.ts

@@ -40,6 +40,7 @@ import { InlinePresetViewExtension } from '@blocksuite/affine-inline-preset/view
 import { ReferenceViewExtension } from '@blocksuite/affine-inline-reference/view';
 import { DragHandleViewExtension } from '@blocksuite/affine-widget-drag-handle/view';
 import { EdgelessAutoConnectViewExtension } from '@blocksuite/affine-widget-edgeless-auto-connect/view';
+import { EdgelessSelectedRectViewExtension } from '@blocksuite/affine-widget-edgeless-selected-rect/view';
 import { EdgelessToolbarViewExtension } from '@blocksuite/affine-widget-edgeless-toolbar/view';
 import { EdgelessZoomToolbarViewExtension } from '@blocksuite/affine-widget-edgeless-zoom-toolbar/view';
 import { FrameTitleViewExtension } from '@blocksuite/affine-widget-frame-title/view';
@@ -112,6 +113,7 @@ export function getInternalViewExtensions() {
     ViewportOverlayViewExtension,
     EdgelessZoomToolbarViewExtension,
     PageDraggingAreaViewExtension,
+    EdgelessSelectedRectViewExtension,
 
     // Fragment
     DocTitleViewExtension,