Request: Zoom in on image follows mouse click position (fix provided)

This feature was mentioned in https://github.com/biati-digital/glightbox/issues/501 A potential fix is included in this new issue. **Current behaviour** In lightbox view, when the user clicks the image to zoom in, the zoom position is fixed. **Please describe the feature you want to be implemented.** In lightbox view, when the user clicks the image to zoom in, the zoom position follows mouse click position. The code to implement this is in my repo [here](https://github.com/AndrewKeYanzhe/glightbox-correctZoom), although I used the distribution version by accident. Some effort will be needed to merge the changes. A demo of glightbox with the desired zoom functionality is shown [here](https://andrewkeyanzhe.github.io/glightbox-correctZoom/GLightbox%20_%20A%20touchable%20pure%20Javascript%20lightbox.html). Click on the green tree trunk. **Explain why the feature is useful** This is more intuitive, and the user does not have to drag the zoomed in image to the desired position. **Have you seen it somewhere else?** This is the default behaviour of image viewers like Adobe Lightroom, and also for Chrome when u view an image in the new tab **Additional context** Add any other context or screenshots about the feature request here.