[FR] Add Icons for categories

[RMStyle]

Is your feature request related to a problem? Please describe.

It would be nice of categories would come with a set of default icons to choose from, so that not every category looks the same out of the box.

Describe the solution you'd like

Integrate an Iconset like Flaticons or Material Icons or something else so that there's a few Icons to choose from.

Additional context

No response

Could you implement it?

Maybe - I can try with guidance

Implementation plan (optional)

1. Look for a free to use icon set with a fitting license
2. Integrate it
3. Upgrade category image search with an overlay to choose an icon