Add Grid view mode

[danielkrajnik]

Is your feature request related to a problem? Please describe.
voidtools everything has a grid preview mode, which is very useful when previewing images.

Right now, it's not possible with fsearch, even though it does support thumbnails (generated with gnome's nemo file explorer or otherwise)

Describe the solution you'd like
upon zooming out either with mouse scrollwheel or with ctrl - keybinding fsearch should display file icons in grid

Describe alternatives you've considered
everything run from wine? trying a completely custom solution as well

Additional context
Add any other context or screenshots about the feature request here.
preview how it works in voidtools everything - it's limited to this image size sadly, but I don't think there should be a limit and images should be as big as user needs (up to a single image per screen to be reasonable)
also they could be more densly laid out on the screen