[F] hope support webp

[chaoshenglu]

🚀 Feature Proposal

hope support webp

Motivation

I have a large number of images to process and I need to use webp to save traffic

Example

const imageId1 = workbook.addImage({
filename: 'path/to/image.webp',
extension: 'webp',
});

[Cat7373]

You can try magic, for example: extension: 'webp' as 'jpeg'

[Cat7373]

It is more than just a psychological comfort. In fact, the generated files will also change. Although Excel seems to be able to handle incorrect image extensions correctly, other software may not be able to handle them correctly.