Add examples and documentation links.

Author: D8H

examples/3d-endless-terrain/3d-endless-terrain.json

@@ -2477,13 +2477,20 @@
       "extensionNamespace": "",
       "fullName": "3D height map",
       "gdevelopVersion": ">=5.5.222",
-      "helpPath": "",
+      "helpPath": "/extensions/height-map-3d/details",
       "iconUrl": "data:image/svg+xml;base64,PD94bWwgdmVyc2lvbj0iMS4wIiBlbmNvZGluZz0iVVRGLTgiPz48IURPQ1RZUEUgc3ZnIFBVQkxJQyAiLS8vVzNDLy9EVEQgU1ZHIDEuMS8vRU4iICJodHRwOi8vd3d3LnczLm9yZy9HcmFwaGljcy9TVkcvMS4xL0RURC9zdmcxMS5kdGQiPjxzdmcgeG1sbnM9Imh0dHA6Ly93d3cudzMub3JnLzIwMDAvc3ZnIiB4bWxuczp4bGluaz0iaHR0cDovL3d3dy53My5vcmcvMTk5OS94bGluayIgdmVyc2lvbj0iMS4xIiBpZD0ibWRpLXRlcnJhaW4iIHdpZHRoPSIyNCIgaGVpZ2h0PSIyNCIgdmlld0JveD0iMCAwIDI0IDI0Ij48cGF0aCBkPSJNMTQsNkwxMC4yNSwxMUwxMy4xLDE0LjhMMTEuNSwxNkM5LjgxLDEzLjc1IDcsMTAgNywxMEwxLDE4SDIzTDE0LDZaIiAvPjwvc3ZnPg==",
       "name": "HeightMap3D",
       "previewIconUrl": "https://asset-resources.gdevelop.io/public-resources/Icons/10e0a26c0d500830dfe23b94138beb0ef61607ba62bca05a5aa5c849777f1b06_terrain.svg",
       "shortDescription": "A terrain with hills where 3D physics objects can stand.",
       "version": "1.0.0",
-      "description": "A terrain with hills where objects with the 3D physics behavior can stand.",
+      "description": [
+        "A terrain with hills where objects with the 3D physics behavior can stand.",
+        "",
+        "A terrain can be built from:",
+        "- an image file",
+        "- noise function ([open the project online](https://editor.gdevelop.io/?project=example://3d-endless-terrain))",
+        ""
+      ],
       "tags": [
         "3d",
         "field",