feat(plugin): 为 LimboBackSpawn 插件添加配置文件支持

- 新增配置文件加载和保存功能
- 添加 maxX、minY 和 maxZ 配置项
- 实现配置文件不存在时自动创建默认配置
- 优化插件启用流程，注册事件和命令

src/main/java/com/blockfantasy/LimboBackSpawn.java

@@ -10,6 +10,12 @@ import com.loohp.limbo.location.Location;
 import com.loohp.limbo.player.Player;
 import com.loohp.limbo.plugins.LimboPlugin;
 
+import java.io.File;
+import java.io.IOException;
+import java.io.InputStream;
+import java.nio.file.Files;
+import java.util.Properties;
+
 public class LimboBackSpawn extends LimboPlugin implements Listener {
     public static LimboBackSpawn instance;
     public static Location spawn;
@@ -21,9 +27,13 @@ public class LimboBackSpawn extends LimboPlugin implements Listener {
     @Override
     public void onEnable() {
         instance = this;
+
+        loadConfig();
+
         spawn = instance.getServer().getServerProperties().getWorldSpawn();
-        Limbo.getInstance().getEventsManager().registerEvents(this,new LimboBackSpawnListener());
+
-        Limbo.getInstance().getPluginManager().registerCommands(this,new GetLocationCommand());
+        instance.getServer().getEventsManager().registerEvents(this,new LimboBackSpawnListener());
+        instance.getServer().getPluginManager().registerCommands(this,new GetLocationCommand());
     }
 
 
@@ -78,4 +88,37 @@ public class LimboBackSpawn extends LimboPlugin implements Listener {
             }
         }
     }
+
+    private void loadConfig() {
+        File configFile = new File(getDataFolder(), "config.properties");
+        if (!configFile.exists()) {
+            saveDefaultConfig(configFile);
+        }
+        Properties props = new Properties();
+        try {
+            props.load(Files.newInputStream(configFile.toPath()));
+
+            maxX = Integer.parseInt(props.getProperty("maxX", "50"));
+            minY = Integer.parseInt(props.getProperty("minY", "-10"));
+            maxZ = Integer.parseInt(props.getProperty("maxZ", "50"));
+
+        } catch (IOException | NumberFormatException e) {
+            instance.getServer().getConsole().sendMessage("无法加载配置文件，使用默认值");
+            maxX = 50;
+            minY = -10;
+            maxZ = 50;
+        }
+    }
+    private void saveDefaultConfig(File configFile) {
+        try {
+            configFile.getParentFile().mkdirs();
+            Properties props = new Properties();
+            props.setProperty("maxX", "50");
+            props.setProperty("minY", "-10");
+            props.setProperty("maxZ", "50");
+            props.store(Files.newOutputStream(configFile.toPath()), "LimboBackSpawn");
+        } catch (IOException e) {
+            instance.getServer().getConsole().sendMessage("无法创建默认配置文件");
+        }
+    }
 }