feat(Examples): consolidate example scenes and provide descriptions

The example scenes have been reduced in number to fewer scenes that
better show off the capabilities and provide text to understand what
each section of the scene is showcasing.

A number of hotfixes have been applied to certain scripts as they
were not working correctly if the SDK Manager was additively
loaded in from another scene.

All original example files have been moved to the `LegacyExampleFiles`
directory.

Author: thestonefox

.gitignore

@@ -13,6 +13,10 @@
 /[Aa]ssets/[Oo]culus[Pp]latform.meta
 /[Aa]ssets/[Oo][Vv][Rr][Aa]vatar/*
 /[Aa]ssets/[Oo][Vv][Rr][Aa]vatar.meta
+/[Aa]ssets/[Oo][Vv][Rr][Aa]udio[Mm]anager/*
+/[Aa]ssets/[Oo][Vv][Rr][Aa]udio[Mm]anager.meta
+/[Aa]ssets/[Oo][Ss][Pp][Nn]ative/*
+/[Aa]ssets/[Oo][Ss][Pp][Nn]ative.meta
 /[Aa]ssets/[Rr]esources/OculusPlatformSettings.asset
 /[Aa]ssets/[Rr]esources/OculusPlatformSettings.asset.meta
 /[Aa]ssets/[Rr]esources/OvrAvatarSettings.asset

Assets/VRTK/Documentation/API.md

@@ -3878,6 +3878,17 @@ The AttemptGrab method will attempt to grab the currently touched Interactable O
 
 The GetGrabbedObject method returns the current Interactable Object being grabbed by the this Interact Grab.
 
+#### ForceControllerAttachPoint/1
+
+  > `public virtual void ForceControllerAttachPoint(Rigidbody forcedAttachPoint)`
+
+ * Parameters
+   * `Rigidbody forcedAttachPoint` - The rigidbody to use as the controller attach point.
+ * Returns
+   * _none_
+
+The ForceControllerAttachPoint method updates the rigidbody being used as the controller grab attach position.
+
 ### Example
 
 `VRTK/Examples/005_Controller/BasicObjectGrabbing` demonstrates the grabbing of interactable objects that have the `VRTK_InteractableObject` script attached to them. The objects can be picked up and thrown around.