Add API for quit reason

paper-server/patches/sources/net/minecraft/server/network/ServerCommonPacketListenerImpl.java.patch

@@ -153,7 +153,7 @@
 +        PacketUtils.ensureRunningOnSameThread(packet, this, this.player.serverLevel());
 +        ResourceLocation identifier = packet.payload().type().id();
 +        ByteBuf payload = ((DiscardedPayload)packet.payload()).data();
- 
++
 +        if (identifier.equals(ServerCommonPacketListenerImpl.CUSTOM_REGISTER)) {
 +            try {
 +                String channels = payload.toString(com.google.common.base.Charsets.UTF_8);
@@ -193,7 +193,7 @@
 +                this.disconnect(Component.literal("Invalid custom payload!"));
 +            }
 +        }
-+
+ 
 +    }
 +
 +    public final boolean isDisconnected() {
@@ -281,7 +281,7 @@
          if (packet.isTerminal()) {
              this.close();
          }
-@@ -175,20 +328,72 @@
+@@ -175,20 +328,73 @@
          }
      }
  
@@ -342,6 +342,7 @@
 +
 +    private void disconnect0(DisconnectionDetails disconnectiondetails) {
 +        // CraftBukkit end
++        this.player.quitReason = org.bukkit.event.player.PlayerQuitEvent.QuitReason.KICKED; // Paper - Add API for quit reason
 +        this.connection.send(new ClientboundDisconnectPacket(disconnectiondetails.reason()), PacketSendListener.thenRun(() -> {
 +            this.connection.disconnect(disconnectiondetails);
          }));