Some WIN32 updates

[o-p-a]

I would like to suggest some improvements for Windows.

• Version bump of workflow actions
• Add manifest file
  • Set activeCodePage to UTF-8 (This allows to remove the wstring conversion in the source)
  • High DPI support
• Improve window processing when starting the game (so that the emulator screen comes to the foreground, and ES comes to the foreground when the emulator is closed)
• "Restart ES" in the exit menu was removed because it does not work on Windows that is not started from script
• Utils::FileSystem::isExecutable() determined by the file extension on Windows

I mind affect as little as possible with mainstream Raspberry Pi builds.

[cmitu]

• Set activeCodePage to UTF-8 (This allows to remove the wstring conversion in the source)

FWIW, this works since Win 10 1903 (https://learn.microsoft.com/en-us/windows/apps/design/globalizing/use-utf8-code-page#set-a-process-code-page-to-utf-8).