Custom log support via callback

[jakobhu]

Is there a way to capture log information from the internal Clarabel solver?
It seems that the rust backend is reporting via std::io::Result<()> - not sure how to capture that from C++.

That is - I would like to acquire the iteration information (pres, dres, etc.) - with the intention of displaying it myself. A callback with a string is how many third-party packages support that.

I've tried to tie with 'stdout' - but that is not very robust, and especially problematic on Windows.

[goulart-paul]

Does #55 do what you want?

It's not straightforward to enable very general callback functions or configuration of streams across the C++/Rust boundary, or at least I don't know how to do so. The PR in #55 allows configuration of the solver to direct output to either stdout, a file, or an internal buffer which can then be recovered as a string. Examples here and here.

Internally in rust (oxfordcontrol/Clarabel.rs#160) I also implemented redirects to more general streams (e.g. TcpSocket would probably work), but without associated wrappers here.

[goulart-paul]

Closing since #55 has been merged and I think addresses the issue. Please reopen if not.