feat(i18n): 新增国际化消息实体与Mapper支持

新增 I18nMessage 实体、Mapper 接口及 XML 映射文件，移除 MyApplication 类上的 @MapperScan 注解，升级 MyBatis-Plus 与 MyBatis 版本至 3.0.3/3.5.5，为后续多语言功能提供数据层基础。

src/main/java/com/yolo/keyborad/MyApplication.java

@@ -10,7 +10,6 @@ import org.springframework.boot.context.properties.EnableConfigurationProperties
 
 @Slf4j
 @SpringBootApplication
-@MapperScan("com.yolo.keyborad.mapper")
 @EnableConfigurationProperties(AppleAppStoreProperties.class)
 public class MyApplication {
     public static void main(String[] args) {

src/main/java/com/yolo/keyborad/mapper/I18nMessageMapper.java

@@ -0,0 +1,15 @@
+package com.yolo.keyborad.mapper;
+
+/*
+* @author: ziin
+* @date: 2025/12/1 20:40
+*/
+
+import com.yolo.keyborad.model.entity.I18nMessage;
+import org.apache.ibatis.annotations.Select;
+
+import java.util.List;
+
+public interface I18nMessageMapper {
+
+}

src/main/java/com/yolo/keyborad/model/entity/I18nMessage.java

@@ -0,0 +1,55 @@
+package com.yolo.keyborad.model.entity;
+
+import io.swagger.v3.oas.annotations.media.Schema;
+
+/*
+* @author: ziin
+* @date: 2025/12/1 20:40
+*/
+    
+@Schema
+public class I18nMessage {
+    @Schema(description="")
+    private Long id;
+
+    @Schema(description="")
+    private String code;
+
+    @Schema(description="")
+    private String locale;
+
+    @Schema(description="")
+    private String message;
+
+    public Long getId() {
+        return id;
+    }
+
+    public void setId(Long id) {
+        this.id = id;
+    }
+
+    public String getCode() {
+        return code;
+    }
+
+    public void setCode(String code) {
+        this.code = code;
+    }
+
+    public String getLocale() {
+        return locale;
+    }
+
+    public void setLocale(String locale) {
+        this.locale = locale;
+    }
+
+    public String getMessage() {
+        return message;
+    }
+
+    public void setMessage(String message) {
+        this.message = message;
+    }
+}