feat(editor): add callout block markdown adapter (#12070)

Closes: [BS-3358](https://linear.app/affine-design/issue/BS-3358/remark-callout-plugin)
Closes: [BS-3247](https://linear.app/affine-design/issue/BS-3247/callout-markdown-adapter-适配)

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

- **New Features**
  - Added support for callout blocks in Markdown, enabling recognition and conversion of callout syntax (e.g., `[!emoji]`) to and from block structures.
- **Bug Fixes**
  - Improved handling to distinguish callout blocks from regular blockquotes and paragraphs during Markdown processing.
- **Tests**
  - Introduced comprehensive tests for callout block serialization, deserialization, and plugin behavior to ensure correct Markdown handling.
- **Chores**
  - Added a new dependency for Markdown AST traversal.
<!-- end of auto-generated comment: release notes by coderabbit.ai -->

blocksuite/affine/shared/package.json

@@ -45,6 +45,7 @@
     "remark-stringify": "^11.0.0",
     "rxjs": "^7.8.1",
     "unified": "^11.0.5",
+    "unist-util-visit": "^5.0.0",
     "yjs": "^13.6.21",
     "zod": "^3.23.8"
   },