feat: add initial People Playground mod development kit

extracted_wiki_content/internalReference/universalbellbehaviour.txt

@@ -0,0 +1,43 @@
+URL: https://wiki.studiominus.nl/internalReference/UniversalBellBehaviour.html
+Title: People Playground Modding - UniversalBellBehaviour
+==================================================
+
+public class UniversalBellBehaviour
+Inherits MonoBehaviour, Messages.IUse
+Controls the universal bells
+Fields
+public int BellClipIndex
+The index of this bell. It represents the associated bell clip in BellClipContainer.BellClips. Use SetBellIndex(int) instead of writing to this.
+
+public AudioSource ClipSource
+[SkipSerialisation]
+The AudioSource that it plays bell sounds from
+
+public Gradient ColourGradient
+[SkipSerialisation]
+The possible colours of a bell
+
+public TextMeshPro DetailViewLabel
+[SkipSerialisation]
+The detail view text under the bell
+
+public float ClapperVelocityInfluence
+[SkipSerialisation]
+How much the velocity of the bell influences the clapper
+
+public float ClapperIntensity
+[SkipSerialisation]
+How much the clapper should move when the bell is activated
+
+Methods
+public void SetBellIndex(int i)
+Set the bell index. This method also sets all the relevant properties
+
+public BellClip GetBellClip()
+Get the BellClip of this bell
+
+public void Use(ActivationPropagation activation)
+No description provided
+
+public void Play()
+Play the bell