Implement execute command packet for lobby

SpigotCore_Main/src/de/steamwar/comms/PacketIdManager.java

@@ -27,6 +27,7 @@ public class PacketIdManager {
     public static final byte TABLIST_NAME = 0x02;
     public static final byte PREPARE_SCHEM = 0x03;
     public static final byte BAUMEMBER_UPDATE = 0x04;
+    public static final byte EXECUTE_COMMAND = 0x05;
     //0x1(X) Bungee Inventory
     public static final byte INVENTORY_PACKET = 0x10;
     public static final byte INVENTORY_CALLBACK_PACKET = 0x11;

SpigotCore_Main/src/de/steamwar/comms/packets/ExecuteCommandPacket.java

@@ -0,0 +1,47 @@
+/*
+    This file is a part of the SteamWar software.
+
+    Copyright (C) 2021  SteamWar.de-Serverteam
+
+    This program is free software: you can redistribute it and/or modify
+    it under the terms of the GNU Affero General Public License as published by
+    the Free Software Foundation, either version 3 of the License, or
+    (at your option) any later version.
+
+    This program is distributed in the hope that it will be useful,
+    but WITHOUT ANY WARRANTY; without even the implied warranty of
+    MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
+    GNU Affero General Public License for more details.
+
+    You should have received a copy of the GNU Affero General Public License
+    along with this program.  If not, see <https://www.gnu.org/licenses/>.
+*/
+
+package de.steamwar.comms.packets;
+
+import com.google.common.io.ByteArrayDataOutput;
+import de.steamwar.comms.PacketIdManager;
+import de.steamwar.sql.SteamwarUser;
+import org.bukkit.entity.Player;
+
+public class ExecuteCommandPacket extends SpigotPacket {
+
+    private final SteamwarUser user;
+    private final String command;
+
+    public ExecuteCommandPacket(Player player, String command) {
+        this.user = SteamwarUser.get(player.getUniqueId());
+        this.command = command;
+    }
+
+    @Override
+    public int getName() {
+        return PacketIdManager.EXECUTE_COMMAND;
+    }
+
+    @Override
+    public void writeVars(ByteArrayDataOutput out) {
+        out.writeInt(user.getId());
+        out.writeUTF(command);
+    }
+}