[orx-shade-styles] Add visualizeNormals shade style.

orx-shade-styles/src/commonMain/kotlin/spatial/VisualizeNormals.kt

@@ -0,0 +1,11 @@
+package org.openrndr.extra.shadestyles.spatial
+
+import org.openrndr.draw.shadeStyle
+
+val visualizeNormals by lazy {
+    shadeStyle {
+        fragmentTransform = """
+        x_fill = vec4(normalize(v_viewNormal)*0.5+0.5, 1.0) ;
+    """.trimIndent()
+    }
+}