feat: emit PlayerSpawnEntityEvent for TNT minecarts

[TTtie]

This patch allows for TNT minecarts to be tracked by API consumers using PlayerSpawnEntityEvent, as they can be used for offensive purposes and due to their non-living nature are not tracked via ItemMonsterEgg.

NB: this may need a bit more work (I just realized that setting the position isn't done for non-living entities in ItemMonsterEgg)