exploration-rover: Add placeholder.

sets/mindstorms/robot-inventor-fan/exploration-rover/index.md

@@ -0,0 +1,26 @@
+---
+title: "Exploration Rover"
+maintainer:
+    user: "laurensvalk"
+    name: "Laurens Valk"
+image:
+    local: "exploration-rover.jpg"
+video:
+    youtube: "3gbAc6iKAJg"
+description:
+    "Six-wheeled rover with instruments to explore new worlds."
+building_instructions:
+    local: "exploration-rover.pdf"
+---
+
+## Description
+
+TODO
+
+## Program
+
+
+{% include copy-code.html %}
+```python
+{% include_relative main.py %}
+```

sets/mindstorms/robot-inventor-fan/index.md

@@ -0,0 +1,7 @@
+---
+title: "51515: Robot Inventor Community Models"
+image:
+    local: "exploration-rover/exploration-rover.jpg"
+layout: set
+description: "Add set description"
+---