First improvements for Visual Studio / MSVC users

- Added missing <array> includes
- -Werror, -Wextra and -Wpedantic are used with GCC only
- CXX_STANDARD_REQUIRED is now ON

desktop/graphics/vulkan_adapter.cpp

@@ -2,6 +2,7 @@
 
 #include "vulkan_common.h"
 
+#include <array>
 #include <cstddef>
 #include <fstream>
 #include <memory>

desktop/graphics/vulkan_uniform.h

@@ -1,5 +1,6 @@
 #pragma once
 
+#include <array>
 #include <memory>
 #include <vector>