This cli program converts STL files into STEP file in a non-trivial way. It segments the mesh into basic shapes. That means, the generated STEP file isn't only a bunch of triangles, it has planes, ...
This post talks about what is an STP file and how you can open such files in Windows 11/10. STP or STEP is a 3D assembly file saved in Standard for the Exchange of Product Data (STEP) format.