feat(qb-core/player): Added server-side event onJobUpdate (#516)

Added server-side event onJobUpdate so scripts can listen on server if any player changed their job. It's safer than redirecting client event to server again.

server/player.lua

@@ -196,6 +196,7 @@ function QBCore.Player.CreatePlayer(PlayerData)
             end
 
             self.Functions.UpdatePlayerData()
+            TriggerEvent('QBCore:Server:OnJobUpdate', self.PlayerData.source, self.PlayerData.job)
             TriggerClientEvent('QBCore:Client:OnJobUpdate', self.PlayerData.source, self.PlayerData.job)
             return true
         end