feat(project): 添加klp-da数据访问模块并集成到项目结构

- 在父pom.xml中添加klp-da模块依赖和版本配置
- 创建新的klp-da子模块及其完整的pom.xml配置文件
- 在主pom.xml的modules部分注册klp-da模块
- 配置klp-da模块的基础依赖包括common、lombok、mybatis-plus和fastjson库
- 更新项目整体的模块引用关系以包含新数据访问层

klp-da/pom.xml

@@ -0,0 +1,41 @@
+<project xmlns="http://maven.apache.org/POM/4.0.0" xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance"
+         xsi:schemaLocation="http://maven.apache.org/POM/4.0.0 http://maven.apache.org/maven-v4_0_0.xsd">
+    <modelVersion>4.0.0</modelVersion>
+    <parent>
+        <groupId>com.klp</groupId>
+        <artifactId>klp-oa</artifactId>
+        <version>0.8.3</version>
+    </parent>
+    <artifactId>klp-da</artifactId>
+    <name>Archetype - klp-da</name>
+    <url>http://maven.apache.org</url>
+
+    <dependencies>
+        <dependency>
+            <groupId>com.klp</groupId>
+            <artifactId>klp-common</artifactId>
+        </dependency>
+        <dependency>
+            <groupId>org.projectlombok</groupId>
+            <artifactId>lombok</artifactId>
+            <scope>provided</scope>
+        </dependency>
+        <dependency>
+            <groupId>com.baomidou</groupId>
+            <artifactId>mybatis-plus-annotation</artifactId>
+            <version>3.5.9</version>
+            <scope>compile</scope>
+        </dependency>
+        <dependency>
+            <groupId>com.alibaba</groupId>
+            <artifactId>fastjson</artifactId>
+            <version>1.2.83</version>
+        </dependency>
+        <!-- 阿里JSON解析器 -->
+        <dependency>
+            <groupId>com.alibaba.fastjson2</groupId>
+            <artifactId>fastjson2</artifactId>
+            <version>2.0.35</version>
+        </dependency>
+    </dependencies>
+</project>