Add main menu scene, setup framework for orientation switching

Assets/Prefabs/Managers/OrientationEnforcer.prefab

@@ -0,0 +1,51 @@
+%YAML 1.1
+%TAG !u! tag:unity3d.com,2011:
+--- !u!1 &7644433920135100480
+GameObject:
+  m_ObjectHideFlags: 0
+  m_CorrespondingSourceObject: {fileID: 0}
+  m_PrefabInstance: {fileID: 0}
+  m_PrefabAsset: {fileID: 0}
+  serializedVersion: 6
+  m_Component:
+  - component: {fileID: 8950196090942657951}
+  - component: {fileID: 8580662658518916835}
+  m_Layer: 0
+  m_Name: OrientationEnforcer
+  m_TagString: Untagged
+  m_Icon: {fileID: 0}
+  m_NavMeshLayer: 0
+  m_StaticEditorFlags: 0
+  m_IsActive: 1
+--- !u!4 &8950196090942657951
+Transform:
+  m_ObjectHideFlags: 0
+  m_CorrespondingSourceObject: {fileID: 0}
+  m_PrefabInstance: {fileID: 0}
+  m_PrefabAsset: {fileID: 0}
+  m_GameObject: {fileID: 7644433920135100480}
+  serializedVersion: 2
+  m_LocalRotation: {x: 0, y: 0, z: 0, w: 1}
+  m_LocalPosition: {x: -5.02902, y: -8.20187, z: 0}
+  m_LocalScale: {x: 1, y: 1, z: 1}
+  m_ConstrainProportionsScale: 0
+  m_Children: []
+  m_Father: {fileID: 0}
+  m_LocalEulerAnglesHint: {x: 0, y: 0, z: 0}
+--- !u!114 &8580662658518916835
+MonoBehaviour:
+  m_ObjectHideFlags: 0
+  m_CorrespondingSourceObject: {fileID: 0}
+  m_PrefabInstance: {fileID: 0}
+  m_PrefabAsset: {fileID: 0}
+  m_GameObject: {fileID: 7644433920135100480}
+  m_Enabled: 1
+  m_EditorHideFlags: 0
+  m_Script: {fileID: 11500000, guid: 5be782e6ff7641519b9bad2e7552d4e8, type: 3}
+  m_Name: 
+  m_EditorClassIdentifier: 
+  orientationConfig: {fileID: 0}
+  orientationPromptPrefab: {fileID: 0}
+  OnOrientationCorrect:
+    m_PersistentCalls:
+      m_Calls: []

Assets/Prefabs/Managers/OrientationEnforcer.prefab.meta

@@ -0,0 +1,7 @@
+fileFormatVersion: 2
+guid: 12d242e44fe80ab44af852254b7cab0f
+PrefabImporter:
+  externalObjects: {}
+  userData: 
+  assetBundleName: 
+  assetBundleVariant: