Support image-gallery widget

[jeroen]

It would be nice if we can show posts with many images (for example screenshots) in a nice way.

The photoswipe JS library is very nice, maybe we can use this hugo plugin like shown here: https://www.liwen.id.au/arduino-rf-codes/

[maelle]

Currently exploring this. Note we shouldn't use the gallery shortcode without specifying alternative text.

[maelle]

https://github.com/mfg92/hugo-shortcode-gallery