feat: Add secondary zoom

[MarcGoekce]

The big picture zoom is nice, but sometimes my images are just too large to be readable (does this mean the design isn't good? maybe).

Something i would love to see, is a secondary zoom feature that allows to zoom in if clicked in the galary view, and zoom out if the image is already zoomed in.

With this:

[MarcGoekce]

Or maybe a scrolling zoom could be cool as well.