Suggestion to use .ifczip extension rather than .zip

I suggest if compressed/zipped example files are added to the repository, they should use a .ifczip file extension rather than .zip
There are a couple such as https://github.com/buildingSMART/IFC4.x-IF/blob/a89e01e4c14c90e7ce77842cabb04b367d437035/IFC-files/IFCRoad-ItalyWG/buildingSMART%20Italy_IFCRoad%20WG.zip

A .ifczip file is typically a compressed file containing only a single step physical file (.ifc)

I think it would be great to encourage greater use of .ifczip extension as a more efficient storage size of infrastructure data sets.

Start with the linked archive in IFC-files/IFCRoad-ItalyWG and inspect the repository for other compressed example files. Confirm which archives contain a single .ifc file, then update the applicable filenames to use .ifczip and verify the renamed files remain usable.

Written by the indexing model from the issue text.