Add extended PaperServerListPingEvent (#980)

* Drop original implementation for old player sample API

* Add extended PaperServerListPingEvent

Add a new event that extends the original ServerListPingEvent
and allows full control of the response sent to the client.

* Implement deprecated player sample API

scripts/importmcdev.sh

@@ -97,6 +97,7 @@ import PlayerConnectionUtils
 import RegionFile
 import RegistryBlockID
 import RemoteControlListener
+import ServerPing
 import StructureBoundingBox
 import StructurePiece
 import StructureStart