Add BRep I/O support (Text and Binary)

[lzpel]

Summary

• Add BRepTools support for text-based BRep I/O (read_brep / write_brep)
• Add BinTools support for binary BRep I/O (read_brep_bin / write_brep_bin)
• Expose these methods on the Shape struct

Description

I needed a way to cache parsed STEP files because Shape::read_step is extremely slow for complex models. For example, a 6MB STEP file takes ~2 minutes to load. OpenCascade supports native BRep serialization (both text and binary) which is orders of magnitude faster than re-parsing STEP.

[bschwind]

Hi @lzpel, thanks for the contribution! I actually didn't know opencascade can serialize its internal R-Rep data like this, very cool.

The code looks good, I'll go ahead and merge it.

[bschwind]

Ah, seems like the C++ code formatting failed, please run:

clang-format -i crates/opencascade-sys/include/wrapper.hxx

[lzpel]

Thank you for your review.
I applied "cargo +nightly fmt" and "clang-format -i crates/opencascade-sys/include/wrapper.hxx" as suggested in README.md.

[bschwind]

Hmm, the formatter check is failing on some docker issues, I'll have to look into it.

[lzpel]

Hi
I fixed a minor naming inconsistency and grouping issue in the BRep I/O bindings. ready for review whenever.

[bschwind]

@lzpel sorry for the wait, thanks again for the PR!