refactor: reorganize packages and replace LPSchematic with WorldEdit

Restructure core modules into subpackages (generator, schematic, config, session, etc.); add .schem/.nbt schematic pipeline, commands, adaptive stats skeleton, and bootstrap wiring.

src/main/java/dev/loki/loparkour/command/player/PlayerCommandHandler.java

@@ -0,0 +1,144 @@
+package dev.loki.loparkour.command.player;
+
+import dev.loki.loparkour.LoParkour;
+import dev.loki.loparkour.command.schematic.SchematicCommandHandler;
+import dev.loki.loparkour.config.core.Config;
+import dev.loki.loparkour.config.locale.Locales;
+import dev.loki.loparkour.menu.core.Menus;
+import dev.loki.loparkour.menu.core.ParkourOption;
+import dev.loki.loparkour.mode.base.Modes;
+import dev.loki.loparkour.player.core.ParkourUser;
+import dev.loki.loparkour.util.text.ColorUtil;
+import org.bukkit.command.CommandSender;
+import org.bukkit.entity.Player;
+import org.jetbrains.annotations.NotNull;
+import org.jetbrains.annotations.Nullable;
+
+import java.util.HashMap;
+import java.util.Map;
+
+/**
+ * Handles all player-facing /parkour sub-commands.
+ * Admin commands are in {@link AdminCommandHandler}.
+ */
+public class PlayerCommandHandler {
+
+    private final Map<String, Long> cooldowns = new HashMap<>();
+
+    public void handleNoArgs(@NotNull CommandSender sender, @Nullable Player player) {
+        if (player != null && ParkourOption.MAIN.mayPerform(player)) {
+            Menus.MAIN.open(player);
+        } else {
+            sendHelp(sender);
+        }
+    }
+
+    public void handle(@NotNull String arg, @NotNull CommandSender sender, @Nullable Player player) {
+        switch (arg.toLowerCase()) {
+            case "help"   -> sendHelp(sender);
+            case "reload" -> handleReload(sender, player);
+        }
+
+        if (player == null) return;
+
+        switch (arg.toLowerCase()) {
+            case "join" -> {
+                if (!cooldown(sender, "join", 2500)) return;
+                if (!ParkourOption.JOIN.mayPerform(player)) {
+                    send(sender, Locales.getString(player, "other.no_do"));
+                    return;
+                }
+                if (ParkourUser.getUser(player) != null) return;
+                Modes.DEFAULT.create(player);
+            }
+            case "leave" -> {
+                if (!cooldown(sender, "leave", 2500)) return;
+                ParkourUser.leave(player);
+            }
+            case "play" -> {
+                if (ParkourOption.PLAY.mayPerform(player)) Menus.PLAY.open(player);
+            }
+            case "menu", "main" -> {
+                if (ParkourOption.MAIN.mayPerform(player)) Menus.MAIN.open(player);
+            }
+            case "leaderboard" -> {
+                if (!ParkourOption.LEADERBOARDS.mayPerform(player)) {
+                    send(sender, Locales.getString(player, "other.no_do"));
+                    return;
+                }
+                Menus.LEADERBOARDS.open(player);
+            }
+            case "schematic" -> {
+                if (!player.hasPermission(ParkourOption.ADMIN.permission)) {
+                    send(sender, Locales.getString(player, "other.no_do"));
+                    return;
+                }
+                SchematicCommandHandler.sendHelp(player);
+            }
+        }
+    }
+
+    private void handleReload(@NotNull CommandSender sender, @Nullable Player player) {
+        if (!cooldown(sender, "reload", 2500)) return;
+        if (!sender.hasPermission(ParkourOption.ADMIN.permission)) {
+            send(sender, Locales.getString(sender, "other.no_do"));
+            return;
+        }
+        Config.reload(false);
+        dev.loki.loparkour.adaptive.bootstrap.AdaptiveServices.reload();
+        send(sender, LoParkour.PREFIX + Locales.getString(sender, "commands.reload"));
+    }
+
+    public void sendHelp(@NotNull CommandSender sender) {
+        send(sender, "");
+        send(sender, Locales.getString(sender, "commands.help.header"));
+        send(sender, "");
+        send(sender, Locales.getString(sender, "commands.help.line_parkour"));
+        if (sender.hasPermission(ParkourOption.JOIN.permission)) {
+            send(sender, Locales.getString(sender, "commands.help.line_join"));
+            send(sender, Locales.getString(sender, "commands.help.line_leave"));
+        }
+        if (sender.hasPermission(ParkourOption.MAIN.permission)) {
+            send(sender, Locales.getString(sender, "commands.help.line_menu"));
+        }
+        if (sender.hasPermission(ParkourOption.PLAY.permission)) {
+            send(sender, Locales.getString(sender, "commands.help.line_play"));
+        }
+        if (sender.hasPermission(ParkourOption.LEADERBOARDS.permission)) {
+            send(sender, Locales.getString(sender, "commands.help.line_leaderboard"));
+        }
+        if (sender.hasPermission(ParkourOption.ADMIN.permission)) {
+            send(sender, Locales.getString(sender, "commands.help.line_schematic"));
+            send(sender, Locales.getString(sender, "commands.help.line_reload"));
+            send(sender, Locales.getString(sender, "commands.help.line_reset"));
+            send(sender, Locales.getString(sender, "commands.help.line_force"));
+            send(sender, Locales.getString(sender, "commands.help.line_recover"));
+        }
+        send(sender, "");
+    }
+
+    public boolean cooldown(CommandSender sender, String key, long millis) {
+        return cooldown(sender, key, millis, null);
+    }
+
+    /**
+     * @param whenBlocked message sent ({@code &#RRGGBB} / {@code &} colors) if still on cooldown; may be null for silent block
+     */
+    public boolean cooldown(CommandSender sender, String key, long millis, @Nullable String whenBlocked) {
+        String fullKey = sender.getName() + ":" + key;
+        long now = System.currentTimeMillis();
+        Long last = cooldowns.get(fullKey);
+        if (last != null && now - last < millis) {
+            if (whenBlocked != null) {
+                send(sender, whenBlocked);
+            }
+            return false;
+        }
+        cooldowns.put(fullKey, now);
+        return true;
+    }
+
+    private void send(CommandSender sender, String message) {
+        sender.sendMessage(ColorUtil.color(message));
+    }
+}