[Typst Universe] Addition of category-specific icons for package list

[neuralpain]

We should have icons next to the package name be represented by the first icon of precedence of one of the categories specified for the package (if any).

I believe this would give the package list a bit of distinction and allow users to have an idea of the package category or purpose before clicking, since the category is not specified on the package result "cells".

I provided an example screenshot below.

[laurmaedje]

I like it.