Fix `Main.cpp` template for `-static` `-debug` builds

[arm32x]

When building a Lime application in debug mode on Windows, the console subsystem is used and Windows looks for a main function. However, the Main.cpp file used when linking statically always defines a WinMain function regardless of whether the application is being built in debug mode.

This pull request adds an additional check in Main.cpp to define a main function instead of WinMain when building in debug mode.

[player-03]

Good explanation, and the changes look straightforward.

Unfortunately I don't test on Windows, so I can't test this myself. Hopefully someone else can come along and give it a spin.