feat: add initial People Playground mod development kit

extracted_wiki_content/internalReference/vibrationbehaviour.txt

@@ -0,0 +1,18 @@
+URL: https://wiki.studiominus.nl/internalReference/VibrationBehaviour.html
+Title: People Playground Modding - VibrationBehaviour
+==================================================
+
+public class VibrationBehaviour
+Inherits MonoBehaviour
+[RequireComponent(typeof(Rigidbody2D))]
+Will vibrate the attached rigidbody 2D
+Fields
+public float VibrateForce
+This object vibrates when activated and this controls the vibration force intensity
+
+public float VibrateRotationSpeed
+Vibration frequency
+
+Properties
+public Vector2 ForceVector { get; }
+Get current force vector that is being applied