Add micro_ros_utilities repo (#324)

Author: pablogs9

config/client_uros_packages.repos

@@ -17,6 +17,10 @@ repositories:
     type: git
     url: https://github.com/ros2/rclc
     version: master
+  uros/micro_ros_utilities:
+    type: git
+    url: https://github.com/micro-ROS/micro_ros_utilities
+    version: main
   uros/rcutils:
     type: git
     url: https://github.com/micro-ROS/rcutils