Summary

This PR adds support for the twoCell editAs option when adding images to Excel worksheets. This feature allows images to be moved and sized with cells, providing better integration with Excel's filtering and row manipulation features.

This addresses the issue discussed in GitHub Discussion #2648 where the images remain visible when rows containing them are filtered or removed. The current library only supports oneCell (default) and absolute positioning, but Excel's native twoCell option provides the expected behavior for images that should move and resize with their containing cells.

• All existing tests pass
• Added new integration test for twoCell functionality
• Manual testing completed with example code

Test plan

See working example demonstrating the twoCell functionality: ExcelJS twoCell Example

worksheet.addImage(imageId, {
  tl: { col: 1, row: 1 },
  br: { col: 2, row: 2 },
  editAs: "twoCell",
});