[DesktopVRIK] Update for 2023r171

Stole AlternateIKSystem for this. Was lazy.

DesktopVRIK/Integrations/AMTAddon.cs

@@ -0,0 +1,21 @@
+
+namespace NAK.DesktopVRIK.Integrations;
+
+public static class AMTAddon
+{
+    #region Variables
+
+    public static bool integration_AMT = false;
+
+    #endregion
+
+    #region Initialization
+
+    public static void Initialize()
+    {
+        integration_AMT = true;
+        DesktopVRIK.Logger.Msg("AvatarMotionTweaker was found. Relying on it to handle VRIK locomotion.");
+    }
+
+    #endregion
+}