Motivation for this change

vkQuake is a Quake 1 port using Vulkan instead of OpenGL for rendering. It is based on the popular QuakeSpasm port and runs all mods compatible with it like Arcane Dimensions or In The Shadows. vkQuake also serves as a Vulkan demo application that shows basic usage of the API. For example it demonstrates render passes & sub passes, pipeline barriers & synchronization, compute shaders, push & specialization constants, CPU/GPU parallelism and memory pooling.

Things done

• Tested using sandboxing (nix.useSandbox on NixOS, or option build-use-sandbox in nix.conf on non-NixOS)
• Built on platform(s)
  • NixOS
  • macOS
  • other Linux distributions
• Tested via one or more NixOS test(s) if existing and applicable for the change (look inside nixos/tests)
• Tested compilation of all pkgs that depend on this change using nix-shell -p nox --run "nox-review wip"
• Tested execution of all binary files (usually in ./result/bin/)
• Fits CONTRIBUTING.md.