Added EntityPortalListener

[sh0inx]

• rewrote PlayerPortalListener to be legible, because holy fuck it needed it
• these two classes are pretty much identical now, if there's an issue with one, there's an issue with both
• noticed that skyblock end -> overworld sends you to the spawn of the overworld instead of the island... not sure why (happens on release build)

[PeachesMLG]

these two classes are pretty much identical now, if there's an issue with one, there's an issue with both

Are they pretty much identical, or are they identical?

If they are identical we should de-duplicate this. They probabbly have a common portal event class.

I remember doing something similar in one of the events and you can basically just do

public void onEntityPortal(event){
   handle(event)
}


public void onPlayerPortal(event){
   handle(event)
}

void handle(PortalEvent event){ 
}

[sh0inx]

these two classes are pretty much identical now, if there's an issue with one, there's an issue with both

Are they pretty much identical, or are they identical?

EntityPortalEvent does not have a TeleportCause, so it looks for whether the entity is standing in an END_PORTAL and works through the logic appropriately.