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.

include/renderer_vk/vulkan_api.hpp

@@ -0,0 +1,10 @@
+#pragma once
+
+#define VK_NO_PROTOTYPES
+#include <vulkan/vulkan.h>
+
+#define VULKAN_HPP_DISPATCH_LOADER_DYNAMIC 1
+#define VULKAN_HPP_NO_EXCEPTIONS
+#include <vulkan/vulkan.hpp>
+#include <vulkan/vulkan_format_traits.hpp>
+#include <vulkan/vulkan_hash.hpp>