LibCore: Implement System::socketpair on Windows

Author: https://github.com/stasoid
Commit: 4ae3522b10
Pull-request: https://github.com/LadybirdBrowser/ladybird/pull/2952
Reviewed-by: https://github.com/ADKaster ✅

Meta/check-style.py

@@ -23,6 +23,7 @@ GOOD_LICENSE_HEADER_PATTERN = re.compile(
 LICENSE_HEADER_CHECK_EXCLUDES = {
     'AK/Checked.h',
     'AK/Function.h',
+    'Libraries/LibCore/SocketpairWindows.cpp',
 }
 
 # We check that "#pragma once" is present