chore(item): 更换物品的配置逻辑，支持跨版本的物品读取、保存。

BREAKING-CHANGE: 旧的配置文件需要进行变更。

src/main/java/cc/carm/plugin/userprefix/manager/ConfigManager.java

@@ -26,7 +26,7 @@ public class ConfigManager {
         File configFile = new File(dataFolder, "config.yml");
         if (!configFile.exists()) {
             try {
-                JarResourceUtils.copyFolderFromJar("en_US", dataFolder, JarResourceUtils.CopyOption.COPY_IF_NOT_EXIST);
+                JarResourceUtils.copyFolderFromJar("i18n", dataFolder, JarResourceUtils.CopyOption.COPY_IF_NOT_EXIST);
                 JarResourceUtils.copyFolderFromJar("prefixes", dataFolder, JarResourceUtils.CopyOption.COPY_IF_NOT_EXIST);
             } catch (IOException e) {
                 e.printStackTrace();

src/main/resources/i18n/en_US/example-prefix.yml

@@ -27,6 +27,8 @@ permission: "yc.vip"
 actions:
   - "[CONSOLE] say %player_name% selected PRO ！"
 
+# Display item configuration
+# More details please see https://github.com/CryptoMorin/XSeries/wiki/XItemStack
 item:
   # itemHasPermission  [Necessary]
   # This Item will be displayed when player has permission

src/main/resources/prefixes/example-prefix.yml

@@ -30,6 +30,7 @@ actions:
   - "[CONSOLE] say %player_name% 选择了 Pro会员前缀 ！"
 
 # 该前缀的GUI物品配置
+# 物品配置方式详见 https://github.com/CryptoMorin/XSeries/wiki/XItemStack
 item:
 
   # 有权限时显示的物品  [必须]