feat: add initial People Playground mod development kit

extracted_wiki_content/internalReference/messages.txt

@@ -0,0 +1,40 @@
+URL: https://wiki.studiominus.nl/internalReference/Messages.html
+Title: People Playground Modding - Messages
+==================================================
+
+public class Messages
+Class that defines some interfaces to make messages safer
+Nested types
+Messages.IOnPhaseLinkCreated
+Messages.IShot
+Messages.IOnPropertyUpdate
+Messages.IUse
+Messages.IUseContinuous
+Messages.IOnFragmentHit
+Messages.ILasered
+Messages.IBreak
+Messages.IDamage
+Messages.ISlice
+Messages.IOnUserFreeze
+Messages.IOnUserUnfreeze
+Messages.IExitShot
+Messages.IDecal
+Messages.IIsolatedContinuousActivation
+Messages.IIsolatedActivation
+Messages.IRepair
+Messages.IOnDrop
+Messages.IOnGripped
+Messages.IStabbed
+Messages.IUnstabbed
+Messages.ILodged
+Messages.IDislodged
+Messages.IStunImpact
+Messages.IWaterImpact
+Messages.IOnEMPHit
+Messages.IOnAfterDeserialise
+Messages.IOnBeforeSerialise
+Messages.IOnUserDelete
+Messages.IOnPoolableInitialised
+Messages.IOnPoolableReinitialised
+Messages.IOnImpactCreated
+Messages.IOnInsideVacuum