Stub Vulkan backend support

A lot of the architecture of the emulator here does not allow for vulkan
to initialize easily since it involves a bit of data to be exchanged
between SDL and Vulkan. This commit just adds the foundational linkage
and library code for vulkan support.

src/core/renderer_vk/vulkan_api.cpp

@@ -0,0 +1,3 @@
+#include "renderer_vk/vulkan_api.hpp"
+
+VULKAN_HPP_DEFAULT_DISPATCH_LOADER_DYNAMIC_STORAGE;