Close [BS-3500](https://linear.app/affine-design/issue/BS-3500/剪刀没问题了,通过拖动形成的段落能不能也有同样的表现?)
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## Summary by CodeRabbit
- **Bug Fixes**
- Improved the behavior when dragging blocks between notes, ensuring that new note blocks are inserted as siblings when appropriate, instead of always creating them at the root level.
- **Tests**
- Enhanced and enabled tests to verify correct drag-and-drop behavior across multiple notes and to ensure the relative order of note content is preserved during drag operations.
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