refactor(editor): rename doc to store on block components (#12173)

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

## Summary by CodeRabbit

- **Refactor**
  - Unified internal data access by replacing all references from `doc` to `store` across all components, blocks, widgets, and utilities. This affects how readonly state, block operations, and service retrieval are handled throughout the application.
- **Tests**
  - Updated all test utilities and test cases to use `store` instead of `doc` for document-related operations.
- **Chores**
  - Updated context providers and property names to reflect the change from `doc` to `store` for improved consistency and maintainability.

No user-facing features or behaviors have changed.

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

blocksuite/affine/widgets/frame-title/src/affine-frame-title-widget.ts

@@ -10,7 +10,7 @@ export const AFFINE_FRAME_TITLE_WIDGET = 'affine-frame-title-widget';
 
 export class AffineFrameTitleWidget extends WidgetComponent<RootBlockModel> {
   private get _frames() {
-    return Object.values(this.doc.blocks.value)
+    return Object.values(this.store.blocks.value)
       .map(({ model }) => model)
       .filter(model => model instanceof FrameBlockModel);
   }

blocksuite/affine/widgets/frame-title/src/edgeless-frame-title-editor.ts

@@ -120,7 +120,7 @@ export class EdgelessFrameTitleEditor extends WithDisposable(
   }
 
   override render() {
-    const rootBlockId = this.editorHost.doc.root?.id;
+    const rootBlockId = this.editorHost.store.root?.id;
     if (!rootBlockId) return nothing;
 
     const viewport = this.gfx.viewport;