Create basic feature list page.

Signed-off-by: Ralph Lange <ralph.lange@de.bosch.com>

Author: ralph-lange

_docs/concepts/client_library/features/index.md

@@ -3,10 +3,14 @@ title: Feature List
 permalink: /docs/concepts/client_library/features/
 ---
 
-**THIS PAGE IS UNDER CONSTRUCTION**
+The micro-ROS Client Library, formed by standard [ROS 2 Client Support Library (rcl)](https://github.com/ros2/rcl/) and the new [ROS 2 Client Library package (rclc)](https://github.com/ros2/rclc/), is going feature all major ROS concepts such as
 
-* Publisher/subscription
-* Services
+* Nodes
+* Publishers/subscriptions
+* Services/clients
 * Graph
 * Executor
-* Lifecycle
+* Lifecycle
+* Parameters
+
+Most features are already available in the Foxy release. Please see our [Feature Overview page](/docs/overview/features/) for details on the status. To learn developing your own application nodes with rcl + rclc, please head to the corresponding [programming tutorial](/docs/tutorials/core/programming_rcl_rclc/).