Windows: Mark executable as DPI aware

When any scaling other than 100% is set for a display, Windows will
automatically scale any DPI unaware applications. This leads to ITGmania being
unusable in fullscreen mode, as parts of the screen are cut off. Add a DPI
aware indication to the manifest to prevent this from happening. Note that
ITGmania won't actually adjust its rendering to the new DPI, it will just
prevent the automatic scaling.

src/archutils/Win32/StepMania.in.manifest

@@ -4,6 +4,7 @@
   <application xmlns="urn:schemas-microsoft-com:asm.v3">
     <windowsSettings>
       <activeCodePage xmlns="http://schemas.microsoft.com/SMI/2019/WindowsSettings">UTF-8</activeCodePage>
+      <dpiAware xmlns="http://schemas.microsoft.com/SMI/2005/WindowsSettings">true/pm</dpiAware>
     </windowsSettings>
   </application>
 </assembly>