重构：重构查询角色树 API 为查询角色字典列表

1.新增 LabelValueVO 通用字典数据结构

continew-admin-common/src/main/java/top/charles7c/cnadmin/common/model/vo/LabelValueVO.java

@@ -0,0 +1,54 @@
+/*
+ * Copyright (c) 2022-present Charles7c Authors. All Rights Reserved.
+ *
+ * Licensed under the Apache License, Version 2.0 (the "License");
+ * you may not use this file except in compliance with the License.
+ * You may obtain a copy of the License at
+ *
+ *     http://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License.
+ */
+
+package top.charles7c.cnadmin.common.model.vo;
+
+import lombok.Data;
+import lombok.NoArgsConstructor;
+import lombok.experimental.Accessors;
+
+import io.swagger.v3.oas.annotations.media.Schema;
+
+/**
+ * 键值对信息
+ *
+ * @param <V>
+ * @author Charles7c
+ * @since 2023/2/24 22:02
+ */
+@Data
+@NoArgsConstructor
+@Accessors(chain = true)
+@Schema(description = "键值对信息")
+public class LabelValueVO<V> {
+
+    /**
+     * 标签
+     */
+    @Schema(description = "标签")
+    private String label;
+
+    /**
+     * 值
+     */
+    @Schema(description = "值")
+    private V value;
+
+    public LabelValueVO(String label, V value) {
+        this.label = label;
+        this.value = value;
+    }
+}