refactor: simplify LoMinesPlugin (220→109 lines)

- Extract ComponentInitializer - component creation and initialization
- Extract RegistrationManager - commands, listeners, integrations
- Main class now delegates to specialized managers

Progress: 3/7 files >200 lines fixed

src/main/java/com/loki/lomines/RegistrationManager.java

@@ -0,0 +1,50 @@
+package com.loki.lomines;
+
+import com.loki.lomines.command.AdminCommands;
+import com.loki.lomines.command.MaskCommands;
+import com.loki.lomines.command.PlayerCommands;
+import com.loki.lomines.command.StatsCommands;
+import com.loki.lomines.integration.IntegrationManager;
+import com.loki.lomines.listener.BlockBreakListener;
+import com.loki.lomines.listener.GroupGuiListener;
+import com.loki.lomines.listener.PlayerInteractListener;
+import com.loki.lomines.listener.PlayerJoinListener;
+import dev.lolib.commands.CommandManager;
+
+/**
+ * Handles registration of commands, listeners, and integrations.
+ */
+final class RegistrationManager {
+
+    private final LoMinesPlugin plugin;
+
+    RegistrationManager(LoMinesPlugin plugin) {
+        this.plugin = plugin;
+    }
+
+    void registerCommands(CommandManager commandManager) {
+        commandManager.register(new AdminCommands(plugin));
+        commandManager.register(new PlayerCommands(plugin));
+        commandManager.register(new StatsCommands(plugin));
+        commandManager.register(new MaskCommands(plugin));
+
+        plugin.loLogger().info("Commands registered");
+    }
+
+    void registerListeners() {
+        plugin.getServer().getPluginManager().registerEvents(new BlockBreakListener(plugin), plugin);
+        plugin.getServer().getPluginManager().registerEvents(new PlayerInteractListener(plugin), plugin);
+        plugin.getServer().getPluginManager().registerEvents(new GroupGuiListener(plugin), plugin);
+
+        if (plugin.getConfig().getBoolean("statistics-enabled", true)) {
+            plugin.getServer().getPluginManager().registerEvents(new PlayerJoinListener(plugin), plugin);
+        }
+
+        plugin.loLogger().info("Event listeners registered");
+    }
+
+    void initializeIntegrations(IntegrationManager integrationManager) {
+        integrationManager.initAll();
+        plugin.loLogger().info("Integrations initialized");
+    }
+}