refactor: migrate package from com.loki to dev.loki

- Change base package from com.loki to dev.loki across all Java files
- Update plugin.yml main class path
- Fix ConfigParseException imports in test files
- Update build.gradle.kts relocate patterns
- Add missing imports in ConfigLoaderTest.java
- Update TODO.md with current status

BREAKING CHANGE: Package namespace changed from com.loki to dev.loki

src/main/java/dev/loki/lomines/integration/IntegrationManager.java

@@ -0,0 +1,74 @@
+package dev.loki.lomines.integration;
+
+import dev.loki.lomines.LoMinesPlugin;
+import org.bukkit.Bukkit;
+
+/**
+ * Manages integrations with external plugins.
+ */
+public final class IntegrationManager {
+
+    private final LoMinesPlugin plugin;
+    // private PlaceholderAPIIntegration placeholderAPI;
+
+    public IntegrationManager(LoMinesPlugin plugin) {
+        this.plugin = plugin;
+    }
+
+    /**
+     * Initializes all available integrations.
+     */
+    public void initAll() {
+        // initPlaceholderAPI();
+        checkWorldGuard();
+        checkOraxen();
+        checkItemsAdder();
+    }
+
+    // private void initPlaceholderAPI() {
+    //     if (isPluginEnabled("PlaceholderAPI")) {
+    //         try {
+    //             placeholderAPI = new PlaceholderAPIIntegration(plugin);
+    //             placeholderAPI.register();
+    //             plugin.loLogger().info("PlaceholderAPI integration enabled");
+    //         } catch (Exception e) {
+    //             plugin.loLogger().warn("Failed to enable PlaceholderAPI integration: " + e.getMessage());
+    //         }
+    //     }
+    // }
+
+    private void checkWorldGuard() {
+        if (isPluginEnabled("WorldGuard")) {
+            plugin.loLogger().info("WorldGuard detected (integration not yet implemented)");
+        }
+    }
+
+    private void checkOraxen() {
+        if (isPluginEnabled("Oraxen")) {
+            plugin.loLogger().info("Oraxen integration available");
+        }
+    }
+
+    private void checkItemsAdder() {
+        if (isPluginEnabled("ItemsAdder")) {
+            plugin.loLogger().info("ItemsAdder integration available");
+        }
+    }
+
+    /**
+     * Checks if a plugin is enabled.
+     */
+    public boolean isPluginEnabled(String pluginName) {
+        return Bukkit.getPluginManager().getPlugin(pluginName) != null &&
+                Bukkit.getPluginManager().isPluginEnabled(pluginName);
+    }
+
+    /**
+     * Unregisters all integrations.
+     */
+    public void shutdown() {
+        // if (placeholderAPI != null) {
+        //     placeholderAPI.unregister();
+        // }
+    }
+}