Add support for Progressive image loading, LQIP /SQIP

[ehsanpo]

Progressive image loading: Before a full image is displayed a blurred version of the image is shown. The blurred image is replace by a high res one as soon as that big version has been downloaded. The blurred image is actually a very tiny image that's being sized up.

They already do it in Laravel. https://docs.spatie.be/laravel-medialibrary/v7/responsive-images/getting-started-with-responsive-images