fix: [旧版]分类字符串改用ASCII的legacy，中文仅作显示名

中文分类名会导致/carpet list命令报拖尾数据错误。

src/main/java/com/github/zly2006/carpetslsaddition/SLSCarpetSettings.java

@@ -7,7 +7,7 @@ public class SLSCarpetSettings {
     public static final String NEED_CLIENT = "needClient";  // 需要客户端安装SLS-Addition或实现相关支持
     public static final String FROM_AMS = "AMS";
     public static final String SLSA = "SLS";
-    public static final String LEGACY = "旧版";
+    public static final String LEGACY = "legacy";
 
     @Rule(categories = {SLSA, RuleCategory.SURVIVAL})
     public static boolean obtainableReinforcedDeepSlate = false;

src/main/resources/assets/slsaddition/lang/en_us.json

@@ -2,7 +2,7 @@
   "carpet.category.pca": "PCA Adaption",
   "carpet.category.needClient":"Need client support",
   "carpet.category.protocol":"Protocol",
-  "carpet.category.旧版": "Legacy",
+  "carpet.category.legacy": "Legacy",
   
 
   "carpet.rule.obtainableReinforcedDeepSlate.name": "Obtainable reinforced deep slate",

src/main/resources/assets/slsaddition/lang/zh_cn.json

@@ -2,7 +2,7 @@
   "carpet.category.pca": "PCA适配",
   "carpet.category.needClient": "需要客户端支持",
   "carpet.category.protocol": "协议",
-  "carpet.category.旧版": "旧版",
+  "carpet.category.legacy": "旧版",
 
 
   "carpet.rule.obtainableReinforcedDeepSlate.name": "强化深板岩可获取",