Initial prompt

Add a new view Flatland: exactly like Topdown, but rotate VOX/OBJ custom models so they face up toward the topdown camera.

Implementation notes:

• Keep camera behavior identical to topdown.
• Apply rotation only to VOX/OBJ-backed entities (custom model wrappers), not built-in primitive meshes.
• Provide a minimal hook (modelPose + setModelPose) so the pose can be applied on enter and updated live when switching presets.