Add a "CC-Free" filter in Build/Buy Mode and CAS

Right now, the only way to avoid CC items is to manually remove them from the Mods folder and restart the game — which is time-consuming and disruptive to the workflow.

A simple CC-free toggle would solve this entirely. The game already tracks which content is CC (it displays the CC icon on items), so the technical foundation for this filter already exists. When the filter is active, all CC items are hidden from catalog lists and search results in Build/Buy and CAS. The CC remains installed and functional — it's just temporarily invisible in the UI.

This would be especially useful for builders and players who actively use CC but also create and share content on the Gallery. It's a quality-of-life improvement that many in the community have been asking for.

Please consider adding this — it would make the workflow significantly smoother for a large part of the player base.