Visual Studio 2022 support and various fixes.

[jheruty]

• Adds support for Visual Studio 2022.
• Increases timeout for compiler initialization, since VS2022 takes significantly longer to start up.
• Fix integration test by quoting path.
• Return in Win32 file watcher callback if nBytesTransferred is zero. This indicates the data isn't ready, and the lack of this check was causing invalid memory reads.
• Switch from std::wstring to std::string in logging, to avoid mixed std::wcout and std::cout which is undefined.
• Reduce GitHub action schedule to once a month.