feat(editor): block comment extension (#12980)

#### PR Dependency Tree


* **PR #12980** 👈

This tree was auto-generated by
[Charcoal](https://github.com/danerwilliams/charcoal)

blocksuite/affine/model/src/blocks/surface-ref/surface-ref-model.ts

@@ -8,14 +8,16 @@ export type SurfaceRefProps = {
   reference: string;
   caption: string;
   refFlavour: string;
+  comments?: Record<string, boolean>;
 };
 
 export const SurfaceRefBlockSchema = defineBlockSchema({
   flavour: 'affine:surface-ref',
-  props: () => ({
+  props: (): SurfaceRefProps => ({
     reference: '',
     caption: '',
     refFlavour: '',
+    comments: undefined,
   }),
   metadata: {
     version: 1,