feat: transition to VexlioHub, clean up modules, add effects & localize configs

- Rename and relocate package from DeluxeHubReloaded to VexlioHub
- Remove deprecated modules: antiwdl, scoreboard, tablist, pvp_mode, teleportation_bow, anti_swear, lockchat, vanish, holograms
- Refactor all commands to standard Bukkit CommandExecutor/TabCompleter registered dynamically via Bukkit CommandMap
- Add particle, sound, and trail configurations for launchpad and double jump modules
- Implement actionbar announcements and join title welcome animation modules
- Fully customize, translate to Czech, and restyle all configuration files in the 'uprava/' directory with the purple-cyan gradient theme

src/main/java/eu/milujukockoholky/vexliolobby/command/commands/ClearchatCommand.java

@@ -0,0 +1,65 @@
+package eu.milujukockoholky.vexliolobby.command.commands;
+
+import eu.milujukockoholky.vexliolobby.VexlioHubPlugin;
+import eu.milujukockoholky.vexliolobby.Permissions;
+import eu.milujukockoholky.vexliolobby.config.Messages;
+import org.bukkit.Bukkit;
+import org.bukkit.command.Command;
+import org.bukkit.command.CommandExecutor;
+import org.bukkit.command.CommandSender;
+import org.bukkit.command.TabCompleter;
+import org.bukkit.entity.Player;
+import org.jetbrains.annotations.NotNull;
+
+import java.util.Collections;
+import java.util.List;
+import java.util.stream.Collectors;
+
+public class ClearchatCommand implements CommandExecutor, TabCompleter {
+
+	public ClearchatCommand(VexlioHubPlugin plugin) {
+	}
+
+	@Override
+	public boolean onCommand(@NotNull CommandSender sender, @NotNull Command cmd, @NotNull String label, String[] args) {
+
+		if (!(sender.hasPermission(Permissions.COMMAND_CLEARCHAT.getPermission()))) {
+			Messages.NO_PERMISSION.send(sender);
+			return true;
+		}
+
+		if (args.length == 0) {
+			for (Player player : Bukkit.getOnlinePlayers()) {
+				for (int i = 0; i < 100; i++) {
+					player.sendMessage("");
+				}
+				Messages.CLEARCHAT.send(player, "%player%", sender.getName());
+			}
+		} else if (args.length == 1) {
+
+			Player player = Bukkit.getPlayer(args[0]);
+			if (player == null) {
+				Messages.INVALID_PLAYER.send(sender, "%player%", args[0]);
+				return true;
+			}
+
+			for (int i = 0; i < 100; i++) {
+				player.sendMessage("");
+			}
+			Messages.CLEARCHAT_PLAYER.send(player, "%player%", sender.getName());
+		}
+		return true;
+	}
+
+	@Override
+	public List<String> onTabComplete(@NotNull CommandSender sender, @NotNull Command cmd, @NotNull String alias, String[] args) {
+		if (args.length == 1) {
+			String current = args[0].toLowerCase();
+			return Bukkit.getOnlinePlayers().stream()
+					.map(Player::getName)
+					.filter(name -> name.toLowerCase().startsWith(current))
+					.collect(Collectors.toList());
+		}
+		return Collections.emptyList();
+	}
+}