Add Vulkan Host-Shader compilation

Compiles Vulkan Host shaders into spirv binary files and embeds them
into the application's virtual file-system.

src/host_shaders/vulkan_display.frag

@@ -0,0 +1,7 @@
+#version 460 core
+layout(location = 0) in vec2 UV;
+layout(location = 0) out vec4 FragColor;
+
+layout(binding = 0) uniform sampler2D u_texture;
+
+void main() { FragColor = texture(u_texture, UV); }