[new] Added support for the `WebP` image format in PC image layers.
[new] Background images are no longer required when building a configurable product.
[new] Expand All / Collapse All buttons have been added to the PC interface.
[new] New setting to choose between PNG/WebP as the generated image output format.
[update] ImageMagick is now the default library for processing images instead of GD Library; GD is now a fallback in cases where ImageMagick is not installed.
[fix] Attribute dropdowns on product pages are now correctly updated if a default layer value is set in PC layer settings.
[fix] Resolved an issue affecting the saving of PC layer stock inventories.
