create FilterBar component

[ac1dbunny21]

we want to:

1. create a new FilterBar component, that should be "collapsable"
   • in collapsed state, the component should look like that
   • in expanded state, the component should look like that
     • it should contain selector for difficulty (single/radio) and tags (multi/checkboxes)
   • the component should accept the following props (non exhaustive):
     • onFilterChange: a function used in container to refetch items with updated filters
2. adapt our Storybook accordingly

[louneskmt]

There is the collapsed version (or at least some of it) in the Builders page.

[louneskmt]

Component created in 71fd63a6f6775fa070ceb25cff00a3e28e69778a and 2a774879308aba1514c239cdc50ec3093e2bcec3. We only have the collapsed state but we don't need much more for now.