feat: Add endpoint to list uploaded files

The code changes include adding a new endpoint `/files` to the `KSFileController` class. This endpoint uses the `GetMapping` annotation to handle GET requests and returns a list of uploaded files (`KSDocument`) from the `ksDocumentRepository`.

This commit message suggests that a new feature has been added to the codebase, specifically an endpoint to list uploaded files.

pom.xml

@@ -61,6 +61,11 @@
 		</dependency>
 		-->
 
+		<dependency>
+			<groupId>org.springframework.boot</groupId>
+			<artifactId>spring-boot-starter-data-rest</artifactId>
+		  </dependency>
+
 		<dependency>
    			<groupId>org.springframework.ai</groupId>
    			<artifactId>spring-ai-mongodb-atlas-store-spring-boot-starter</artifactId>