Add maze FBX prefabs and update workspace

Add a new "Assets/Prefabs/Maze/Maze Completed" folder with multiple FBX models (corner, straight, T/junction, cross, dead-end, pipes, planes, light) and corresponding .meta importer files, plus a folder .meta. Update .idea workspace.xml to remove two tracked asset entries and adjust a workItem duration. Also modify Assets/Scripts/Camera Controller/CameraRotationHandler.cs (minor change). These changes import completed maze assets into the project and tidy up IDE workspace metadata.

Assets/UI/MainPanelSettings.asset

@@ -21,7 +21,7 @@ MonoBehaviour:
   m_ScaleMode: 1
   m_ReferenceSpritePixelsPerUnit: 100
   m_PixelsPerUnit: 100
-  m_Scale: 1.6899998
+  m_Scale: 1
   m_ReferenceDpi: 96
   m_FallbackDpi: 96
   m_ReferenceResolution: {x: 1200, y: 800}