Implement caching on bungee platform

bungeecord/src/main/java/io/github/retrooper/packetevents/bungee/factory/BungeePacketEventsBuilder.java

@@ -31,6 +31,7 @@ import com.github.retrooper.packetevents.netty.channel.ChannelHelper;
 import com.github.retrooper.packetevents.protocol.ConnectionState;
 import com.github.retrooper.packetevents.protocol.ProtocolVersion;
 import com.github.retrooper.packetevents.protocol.packettype.PacketType;
+import com.github.retrooper.packetevents.protocol.player.ClientVersion;
 import com.github.retrooper.packetevents.protocol.player.User;
 import com.github.retrooper.packetevents.protocol.player.UserProfile;
 import com.github.retrooper.packetevents.settings.PacketEventsSettings;
@@ -50,6 +51,7 @@ import net.md_5.bungee.protocol.ProtocolConstants;
 import org.jetbrains.annotations.NotNull;
 import org.jetbrains.annotations.Nullable;
 
+import java.util.Objects;
 import java.util.logging.Level;
 import java.util.regex.Pattern;
 
@@ -103,6 +105,12 @@ public class BungeePacketEventsBuilder {
                     }
                     return version;
                 }
+
+                @Override
+                public Object getRegistryCacheKey(User user, ClientVersion version) {
+                    ProxiedPlayer player = ProxyServer.getInstance().getPlayer(user.getUUID());
+                    return player == null ? null : Objects.hash(player.getServer().getInfo(), version);
+                }
             };
 
             private final PlayerManagerAbstract playerManager = new PlayerManagerAbstract() {