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

#### PR Dependency Tree


* **PR #12980** 👈

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blocksuite/affine/blocks/embed/src/configs/toolbar.ts

@@ -13,6 +13,7 @@ import {
 } from '@blocksuite/affine-shared/consts';
 import {
   ActionPlacement,
+  blockCommentToolbarButton,
   EmbedOptionProvider,
   type LinkEventType,
   type ToolbarAction,
@@ -348,6 +349,10 @@ function createBuiltinToolbarConfigForExternal(
           });
         },
       },
+      {
+        id: 'e.comment',
+        ...blockCommentToolbarButton,
+      },
       {
         placement: ActionPlacement.More,
         id: 'a.clipboard',