move shaders to subfolder

src/shaders/shader.frag

@@ -0,0 +1,13 @@
+// shader.frag
+#version 450
+
+layout(location=0) in vec2 vert_uv;
+layout(location=0) out vec4 frag_color;
+
+layout(set=0, binding=0) uniform texture2D tex;
+layout(set=0, binding=1) uniform sampler tex_smp;
+
+void main() 
+{
+    frag_color = texture(sampler2D(tex, tex_smp), vert_uv);
+}