Playground: Add `normalMap` node. (#29652)

playground/Nodes.json

@@ -1478,6 +1478,21 @@
 								}
 							]
 						},
+						{
+							"name": "Normal Map",
+							"icon": "photo",
+							"description": "Converts a normal map value to a normal vector.",
+							"shaderNode": "normalMap",
+							"nodeType": "node",
+							"properties": [
+								{
+									"name": "node",
+									"nodeType": "vec3",
+									"label": "normal",
+									"description": "Specifies the vector to convert."
+								}
+							]
+						},
 						{
 							"name": "Round",
 							"icon": "math-function",