Add extended PaperServerListPingEvent

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

paper-api/src/main/java/com/destroystokyo/paper/network/StatusClient.java

@@ -0,0 +1,13 @@
+package com.destroystokyo.paper.network;
+
+import com.destroystokyo.paper.event.server.PaperServerListPingEvent;
+
+/**
+ * Represents a client requesting the current status from the server (e.g. from
+ * the server list).
+ *
+ * @see PaperServerListPingEvent
+ */
+public interface StatusClient extends NetworkClient {
+
+}