direct copy vulkan-zig example

src/shaders/triangle.vert

@@ -0,0 +1,11 @@
+#version 450
+
+layout(location = 0) in vec2 a_pos;
+layout(location = 1) in vec3 a_color;
+
+layout(location = 0) out vec3 v_color;
+
+void main() {
+    gl_Position = vec4(a_pos, 0.0, 1.0);
+    v_color = a_color;
+}