Refactor Redis Data Integration API documentation structure and add authentication details

Author: spicy-sauce

content/integrate/redis-data-integration/reference/api.md

@@ -8,8 +8,6 @@ categories: ["redis-di"]
 aliases:
 ---
 
-# Redis Data Integration API
-
 This is the REST API reference for Redis Data Integration services.
 The API provides endpoints to manage and monitor your Redis Data Integration deployments.
 

content/integrate/redis-data-integration/reference/api/_index.md

@@ -0,0 +1,22 @@
+---
+Title: Redis Data Integration API Reference
+linkTitle: API Reference
+description: REST API reference for Redis Data Integration
+weight: 20
+alwaysopen: false
+categories: ["redis-di"]
+aliases:
+---
+
+This is the REST API reference for Redis Data Integration services.
+The API provides endpoints to manage and monitor your Redis Data Integration deployments.
+
+[Open API Documentation]({{< relref "/integrate/redis-data-intrgration/reference/api/api-reference" >}})
+
+## Authentication
+
+When authentication is enabled, you need to obtain a token using the login endpoint before accessing secured endpoints.
+
+## Base URL
+
+All API endpoints are relative to the base URL of your Redis Data Integration API server.