Add editor only behavior to create pools when a prefab is first instantiated - currently it will only create the pool & start refilling it once the prefab is killed, not when it is first spawned - convar `instantiate_creates_pools` (default false) will cause the pool to created after the prefab is first spawned - this isn't an issue in standalone builds as it will warmup the prefabs on the menu and fill the prefab pool while connecting to the server - can't use the warmup command to fill pools in the editor as that takes 30s+ and isn't great for testing