initial commit-moved from vulkan_guide

shaders/fullscreen.vert

@@ -0,0 +1,10 @@
+#version 450
+
+layout(location=0) out vec2 outUV;
+
+void main() {
+    vec2 positions[3] = vec2[3](vec2(-1.0, -1.0), vec2(3.0, -1.0), vec2(-1.0, 3.0));
+    vec2 uvs[3] = vec2[3](vec2(0.0, 0.0), vec2(2.0, 0.0), vec2(0.0, 2.0));
+    gl_Position = vec4(positions[gl_VertexIndex], 0.0, 1.0);
+    outUV = uvs[gl_VertexIndex];
+}