Added rbs_gym package for RL & multi-robot launch setup

repos/cartesian_controllers.repos

@@ -1,8 +1,8 @@
 repositories:
-  cartesian-controllers:
+  cartesian_controllers:
     type: git
-    url: https://github.com/fzi-forschungszentrum-informatik/cartesian_controllers.git
-    version: ros2
+    url: https://github.com/solid-sinusoid/cartesian_controllers.git
+    version: gazebo-simulation
   ros2_control:
     type: git
     url: https://github.com/solid-sinusoid/ros2_control.git
@@ -10,4 +10,4 @@ repositories:
   gz_ros2_control:
     type: git
     url: https://github.com/solid-sinusoid/gz_ros2_control.git
-    version: pass-robot-description
+    version: fts-sensor

repos/sim.rbs.repos

@@ -3,6 +3,10 @@ repositories:
     type: git
     url: https://github.com/solid-sinusoid/rbs-arm.git
     version: main
+  robot_builder:
+    type: git
+    url: https://github.com/solid-sinusoid/robot-builder.git
+    version: main
   rbs_gripper:
     type: git
     url: https://github.com/solid-sinusoid/rbs-gripper.git