feat: add backdoor login functionality for testing environment

- Implemented SysUserMapper to include a method for selecting available users for backdoor login.
- Created XML mappings for the new backdoor user selection query.
- Added BackDoorLoginProperties to manage configuration settings for backdoor login.
- Developed BackDoorLoginController to handle user selection and login processes.
- Introduced BackDoorPageRenderer for rendering HTML pages for user selection and login.
- Implemented BackDoorLoginService to manage user validation and token generation.
- Added HTML templates for user selection, login, and error handling.
- Created unit tests for BackDoorLoginController, BackDoorPageRenderer, and BackDoorLoginService to ensure functionality and security.
- Documented usage and configuration in test-backdoor-login.md.

ruoyi-admin/pom.xml

@@ -110,6 +110,12 @@
             <artifactId>gson</artifactId>
             <version>2.9.1</version>
         </dependency>
+
+        <dependency>
+            <groupId>org.springframework.boot</groupId>
+            <artifactId>spring-boot-starter-test</artifactId>
+            <scope>test</scope>
+        </dependency>
     </dependencies>
 
     <build>
@@ -142,4 +148,4 @@
         <finalName>${project.artifactId}</finalName>
     </build>
 
-</project>
+</project>