docs: add ros noetic example (#2271)

examples/turtlesim/README.md

@@ -1,10 +1,13 @@
-# Simple ROS2 turtlesim example
+# Simple ROS turtlesim example
 
-Run this in two terminals.
+## To run the ROS2 humble example
+Run this in **two** terminals.
 ```shell
 pixi run start
 ```
-And
+Select the `default` environment for all of the `humble` examples.
+
+And then
 ```shell
 pixi run teleop
 ```
@@ -15,3 +18,52 @@ There you can run any of the commands available in the environment.
 pixi shell
 ros2 topic echo /turtle1/cmd_vel
 ```
+
+### Now run a script to visualize the turtle in rviz
+Run this in **two** more terminals.
+```shell
+pixi run rviz
+```
+
+```shell
+pixi run viz
+```
+
+## To run the ROS1 Noetic example
+
+Run this in **three** terminals.
+```shell
+# Start roscore
+pixi run -e noetic core
+```
+or without `-e noetic` and select the `noetic` environment for all of the `noetic` examples.
+
+```shell
+# Start turtlesim
+pixi run -e noetic start
+```
+
+```shell
+pixi run -e noetic teleop
+```
+
+It is also possible to start a shell in the environment.
+There you can run any of the commands available in the environment.
+```shell
+pixi shell -e noetic
+rostopic echo /turtle1/cmd_vel
+```
+
+### Now run a script to visualize the turtle in rviz
+Run this in **two** more terminals.
+```shell
+pixi run -e noetic rviz
+```
+
+```shell
+pixi run -e noetic viz
+```
+
+Add the visual marker for the turtle to the displays in rviz.
+
+If you now teleop the turtle, you should see it move in rviz aswell now.