[Feature] Client Callbacks

Creates support for utilization of Client Callbacks.

server/functions.lua

@@ -196,8 +196,15 @@ function PaycheckInterval()
     SetTimeout(QBCore.Config.Money.PayCheckTimeOut * (60 * 1000), PaycheckInterval)
 end
 
--- Callbacks
+-- Callback Functions --
 
+-- Client Callback
+function QBCore.Functions.TriggerClientCallback(name, source, cb, ...)
+    QBCore.ClientCallbacks[name] = cb
+    TriggerClientEvent('QBCore:Client:TriggerClientCallback', source, name, ...)
+end
+
+-- Server Callback
 function QBCore.Functions.CreateCallback(name, cb)
     QBCore.ServerCallbacks[name] = cb
 end