Resolve Issue #483

[AlrondPrime]

Add support of std::initializer_list<string_view> for windows::default_launcher::operator()

[AlrondPrime]

The pipeline failed due to changes made around April 14 in the file include\boost\process\v2\stdio.hpp that are incompatible with Windows. Should I fix the errors in this file, or would it be better to fork from another commit and attempt to merge the code there?

[klemens-morgenstern]

You can add it to this PR if you want

[AlrondPrime]

I’d prefer to focus on the changes I’ve already made, which are unrelated to the issue in stdio.hpp.
I can help fix the Windows compatibility separately later if needed.

[klemens-morgenstern]

Ok, I'll see that I find the time this week to properly review this PR.