basic rendering for both opengl and vulkan

assets/shaders/quad.frag

@@ -0,0 +1,10 @@
+#version 450
+
+layout(location = 0) in vec3 frag_color;
+
+layout(location = 0) out vec4 out_color;
+
+void main()
+{
+	out_color = vec4(frag_color, 1.0);
+}