.step and cad filters in search

Great suggestion! Unfortunately this isn't something we can implement reliably right now. The problem is that only some platforms (like Printables) expose file format information through their API. Most sources — including Thingiverse, MakerWorld, and others — don't provide this data at all. That means we could only show file format badges for a fraction of models, which would be misleading: a model without a STEP badge wouldn't necessarily mean it's STL-only — it could just mean we don't have that information. We'll keep this on our radar and revisit it if more platforms start exposing file format data in the future. Thanks for the idea!