Metal render fixes, make compile MacOS arm64 compatible

[JoseVarelaP]

This pull request makes updates to the macOS implementation of the Vulkan pipeline for the game, by updating all the calls to current Metal Surface instances, and direct NSWindow scaling.

It also updates the XCode project to allow for arm64 building of the game, allowing for a native Apple Silicon build of the executable (and libraries), and even a universal build with ${ARCHS_STANDARD}.

Do note that the changes do bump the minimum macOS version to 11, given the libvulkan library provided on the Vulkan SDK these days is built against that. The game can be built on a lower version, but to avoid the warning, I made the change.