Render and fill the template with automatic handling of cell merging functionality 渲染填充模板自动处理单元格合并功能

[wangmiscoding]

Resolve the issue where newly added rows do not inherit the original row's merge information during template filling:

1. Only effective when direction=VERTICAL in FillConfig.
2. Only effective when autoStyle=true in FillConfig.
3. Only effective when forceNewRow=true in FillConfig.
4. Only effective when the merge region of the original row does not span across row.