Improve plugin registration logic in YardWatch

Refactored the plugin enablement checks in `YardWatch.java` to use a new method `shouldRegisterService`. This method determines if a plugin is enabled and if it provides an implementation for the Protection service, therefore enhancing plugin setup accuracy.

src/main/java/me/youhavetrouble/yardwatch/YardWatch.java

@@ -2,27 +2,51 @@ package me.youhavetrouble.yardwatch;
 
 import me.youhavetrouble.yardwatch.hooks.GriefPreventionProtection;
 import me.youhavetrouble.yardwatch.hooks.WorldGuardProtection;
-import org.bukkit.plugin.PluginManager;
+import org.bukkit.plugin.Plugin;
+import org.bukkit.plugin.RegisteredServiceProvider;
 import org.bukkit.plugin.ServicePriority;
 import org.bukkit.plugin.java.JavaPlugin;
 
+import java.util.List;
+
 public final class YardWatch extends JavaPlugin {
 
     @Override
     public void onEnable() {
-        PluginManager pluginManager = getServer().getPluginManager();
 
-        if (pluginManager.isPluginEnabled("WorldGuard")) {
+        if (shouldRegisterService("WorldGuard")) {
             getServer().getServicesManager().register(
                     Protection.class, new WorldGuardProtection(this), this, ServicePriority.Normal
             );
         }
 
-        if (pluginManager.isPluginEnabled("GriefPrevention")) {
+        if (shouldRegisterService("GriefPrevention")) {
             getServer().getServicesManager().register(
                     Protection.class, new GriefPreventionProtection(this), this, ServicePriority.Normal
             );
         }
 
     }
+
+    /**
+     * Determines whether a service should be registered for a given plugin.
+     * @param pluginName The name of the plugin
+     * @return True if the service should be registered, false otherwise
+     */
+    private boolean shouldRegisterService(String pluginName) {
+        Plugin plugin = getServer().getPluginManager().getPlugin(pluginName);
+        if (plugin == null || !plugin.isEnabled()) return false;
+        List<RegisteredServiceProvider<?>> serviceProviders = getServer().getServicesManager().getRegistrations(plugin);
+        for (RegisteredServiceProvider<?> serviceProvider : serviceProviders) {
+            if (serviceProvider.getService() == Protection.class) {
+                return false;
+            }
+        }
+        return true;
+    }
+
+    @Override
+    public void onDisable() {
+        getServer().getServicesManager().unregisterAll(this);
+    }
 }