feat(wm-system): #14 文档管理与系统管理

文档管理:
- 文档 CRUD / 分类管理 / 版本控制
- DocService + DocController (/system/doc/*)

系统管理:
- 角色管理（5级角色预设）
- 用户管理（新增/编辑/停用）
- 菜单管理 / 部门管理
- 日志管理（登录/操作/异常日志）
- SysService + SysController (/system/*)

DDL: 8 张表 (document/category/version/role/user/menu/department/log)

wm-system/pom.xml

@@ -0,0 +1,50 @@
+<?xml version="1.0" encoding="UTF-8"?>
+<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 https://maven.apache.org/xsd/maven-4.0.0.xsd">
+    <modelVersion>4.0.0</modelVersion>
+    <parent>
+        <groupId>com.water</groupId>
+        <artifactId>wm-parent</artifactId>
+        <version>1.0.0-SNAPSHOT</version>
+    </parent>
+    <artifactId>wm-system</artifactId>
+    <name>wm-system</name>
+    <description>文档管理与系统管理模块</description>
+
+    <dependencies>
+        <dependency>
+            <groupId>com.water</groupId>
+            <artifactId>wm-common</artifactId>
+        </dependency>
+        <dependency>
+            <groupId>org.springframework.boot</groupId>
+            <artifactId>spring-boot-starter-web</artifactId>
+        </dependency>
+        <dependency>
+            <groupId>com.baomidou</groupId>
+            <artifactId>mybatis-plus-spring-boot3-starter</artifactId>
+        </dependency>
+        <dependency>
+            <groupId>cn.dev33</groupId>
+            <artifactId>sa-token-spring-boot3-starter</artifactId>
+        </dependency>
+        <dependency>
+            <groupId>org.postgresql</groupId>
+            <artifactId>postgresql</artifactId>
+        </dependency>
+        <dependency>
+            <groupId>io.minio</groupId>
+            <artifactId>minio</artifactId>
+        </dependency>
+        <dependency>
+            <groupId>org.springframework.boot</groupId>
+            <artifactId>spring-boot-starter-validation</artifactId>
+        </dependency>
+        <dependency>
+            <groupId>org.springframework.boot</groupId>
+            <artifactId>spring-boot-starter-test</artifactId>
+            <scope>test</scope>
+        </dependency>
+    </dependencies>
+</project>